Refrigerant Piping Handbook
by
Garth Denison
Refrigerant Piping Handbook.ppt
Suva
®
refrigerants
Acknowledgements
The author wishes to acknowledge the contribution of various
friends, co-workers and former colleagues. Gino DiFebo,
Nick Reggi, Wesley Taylor and Laurence White enriched the
pages of this work with their perspectives and knowledge. It
was their participation, discussions, review and comments that
made this publication possible.
Dedication
To the advancement of the profession and its members.
Suva
®
refrigerants
Table of Contents
Engineering Data
………………..
Section One
Piping Losses
………………..
Section Two
Nomographs
………………..
Section Three
Piping Procedures
………………..
Section Four
Expansion / Contraction …………….
Section Five
Best Practices
………………..
Section Six
Quick Pick Criteria
………………..
Section Seven
HFC Quick Pick Tables …………….
Section Eight
HCFC Quick Pick Tables …………..
Section Nine
CFC Quick Pick Tables …………….
Section Ten
Engineering Data
Section 1
Suva
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refrigerants
Engineering Data
Section 1 page .. 1
Suva
®
Engineering Data … Section One
Design Goals
…………….
page
3
Application Considerations ………..
page 5
Code Regulations
page
………………
refrigerants
6
General Design Principles …………
page 7
Capacity versus Pressure Drop ……
page 8
Equivalent Lengths ……………….
page 9
Copper Tubing Specifications …….
page 10
Weight of Refrigerant in Copper ….
page 11
Refrigerant Receivers ……………..
page 12
Temperature / Pressure tables …….
page 13
Refrigeration Piping Schematics ….
page 14
TEL Work Sheets …………………
page 16
Glossary of Terms ………………...
page 18
Section 1 page .. 2
Suva
®
refrigerants
Refrigerant Piping
Design Goals
A common goal is to size the Suction, Hot Gas and Liquid
lines for about 1Fº pressure drop at design capacity.
A Suction line must:
The Hot Gas Discharge line must:
•
return oil from the evaporator to the
compressor at minimum system capacity.
•
avoid oil trapping at minimum system
capacity.
•
prevent oil draining from an active to an
inactive evaporator when more than one
evaporator is used in a single system.
•
prevent backflow of oil or liquid
refrigerant to the compressor during low
capacity or shutdown.
•
dampen or eliminate line vibrations and noise
cause by compressor vibration.
•
•
minimize line sweating from condensation.
dampen or eliminate line vibration and
noise caused by gas pulsations and
compressor vibration.
•
prevent unnecessary heat gain into the
refrigerant.
continued ...
Section 1 page .. 3
Suva
®
Refrigerant Piping
refrigerants
Design Goals
The Liquid line must prevent:
•
formation of flash gas upstream of the metering
device.
•
heat gain to the refrigerant.
The Hot Gas Defrost line must:
•
maintain sufficient refrigerant flow rate. The
velocity determined at saturated conditions
will result in a conservative line size.
•
be properly sized to handle the calculated
needed hot gas load, this is based on twice the
evaporator flow rate.
•
prevent condensed liquid refrigerant from
backflow to the compressor while on defrost or
shutdown.
The refrigerant Condensate line must:
•
provide sewer-type flow; that is, free draining of
liquid refrigerant in one direction, while
refrigerant vapour flows adjacent to the liquid in
the other direction.
Good refrigeration piping design requires that the refrigeration lines be pitched in the direction of flow at
approximately 1/2 inch per 10 feet or 1 inch per 20 feet.
Refrigerant velocities in vertical lines should be at least 1500 ft/min to ensure good oil return;
velocities in horizontal lines should be at least 750 ft/min.
Section 1 page .. 4
Suva
®
Refrigerant Piping
refrigerants
Application Considerations
•
System design for MINIMUM pressure drop.
Pressure loss results in:
a. decrease in thermal capacity
b. increase power requirements (see page 8)
•
Refrigerant being piped DOES NOT change state.
•
Lubricants are miscible with refrigerants.
•
minimize the accumulation of liquid
refrigerant in compressor crankcase
•
oil returns to compressor at same rate
which it leaves
Section 1 page .. 5
Suva
®
Refrigerant Piping
refrigerants
Code Regulations
Design should conform to all codes, law and regulations that
apply at the “SITE” of the installation.
Examples:
Mechanical Refrigeration Code .. CSA B52
Canadian Building Code
ASHRAE 15
Municipal / State / Provincial Codes
OEM’s Recommended Installation Guidelines
Section 1 page .. 6
Suva
®
Refrigerant Piping
refrigerants
General Design Principles
•
Ensure proper feed to evaporators.
•
Practical line sizes without excessive pressure drop.
•
Protect compressor by:
•
preventing excessive oil from being trapped in a
system.
•
minimizing oil loss from the compressor.
•
preventing liquid refrigerant or oil from entering the
compressor while operating or while on the off cycle.
•
maintaining a clean and dry system.
Section 1 page .. 7
Suva
®
refrigerants
Refrigerant Piping
Capacity Versus Line Pressure Drop
Vapour Lines
Liquid Lines
Capacity % HP/Ton %
Pressure drop not as critical as in vapour lines.
No line loss
100.0
100.0
2F º Suction line
95.7
103.5
•
vapour formation in line
2F º Hot gas discharge line 98.4
103.5
•
insufficient liquid pressure at DX device
92.2
106.8
4F º Hot gas discharge line 96.8
106.8
4F º Suction line
Pressure drop should not cause:
Typical liquid line pressure drop no greater
than 1Fº change in refrigerant temperature.
Section 1 page .. 8
Suva
®
refrigerants
Refrigerant Piping
Equivalent Lengths of Nonferrous Valves and Fittings
Equivalent Length is expressed in Feet of Pipe
Line Size
OD
Globe /
Solenoid
Valve
Angle /
Check
Valve
90 º SR
Elbow
1/2
9
5
1.4
0.9
5/8
12
6
1.5
3/4
14
7
7/8
15
1 1/8
90 º LR
Elbow
45 º
Elbow
Enlarging Coupling
1/2
3/4
Reducing Coupling
1/2
3/4
Tee Line /
Sight
Glass
Tee
Branch
0.4
0.6
2.0
1.4
0.8
0.3
0.7
0.5
0.3
1.0
0.5
0.8
2.5
1.8
1.1
0.4
0.9
0.7
0.4
1.9
1.3
0.6
0.9
3.0
2.5
1.5
0.5
1.2
1.0
0.5
8
2.3
1.5
0.7
1.0
3.5
3.2
2.0
0.7
1.6
1.2
0.7
22
12
2.7
1.8
0.9
1.5
4.5
4.7
3.0
1.0
2.3
1.8
1.0
1 3/8
28
15
3.6
2.4
1.2
1.8
6.0
5.8
3.6
1.2
2.9
2.2
1.2
1 5/8
35
17
4.2
2.8
1.4
2.0
7.0
8.0
4.8
1.6
4.0
3.0
1.6
2 1/8
45
22
5.9
3.9
1.8
3.0
10.0
10
6.1
2.0
5.0
3.8
2.0
2 5/8
51
26
6.9
4.6
2.2
3.5
12.0
13
8.0
2.6
6.5
4.9
2.6
3 1/8
65
34
7.7
5.5
2.7
4.5
15.0
15
9.2
3.0
7.7
6.0
3.0
3 5/8
80
40
9.8
6.5
3.0
5.0
17.0
17
11
3.8
9.0
6.8
3.8
1/4
d
Muller Brass Co. Data
Note: General accepted industry practice for determining the equivalent lengths for both P traps and
U Bends is to add two 90° LR elbows of the specific OD tubing size for each component used.
1/4
D
D
d
Carrier Engineering Manual number 3
Enter table for losses at smallest diameter “d”
Section 1 page .. 9
Suva
®
Refrigerant Piping
refrigerants
Copper Tubing Specifications
Nominal (OD)
Diameter
Type
3/8
Diameter
OD In
ID In
Flow Area
sq. In.
Weight
Lb/Lin Ft.
K
L
0.375
0.375
0.305
0.315
0.073
0.078
0.145
0.126
1/2
K
L
0.500
0.500
0.402
0.430
0.127
0.145
0.269
0.198
5/8
K
L
0.625
0.625
0.527
0.545
0.218
0.233
0.344
0.285
3/4
K
L
0.750
0.750
0.652
0.666
0.334
0.348
0.418
0.362
7/8
K
L
0.875
0.875
0.745
0.785
0.436
0.484
0.641
0.455
1 1/8
K
L
1.125
1.125
0.995
1.025
0.778
0.825
0.839
0.655
1 3/8
K
L
1.375
1.375
1.245
1.265
1.22
1.26
1.040
0.884
1 5/8
K
L
1.625
1.625
1.481
1.505
1.72
1.78
1.36
1.14
2 1/8
K
L
2.125
2.125
1.959
1.985
3.01
3.10
2.06
1.75
2 5/8
K
L
2.625
2.625
2.435
2.465
4.66
4.77
2.93
2.48
1967 ASHRAE Guide and Data Book
3 1/8
K
L
3.125
3.125
2.907
2.945
6.64
6.81
4.00
3.33
{ Maximum allowable hanger distance
as per CSA B52 code
3 5/8
K
L
3.625
3.625
3.385
3.425
9.00
9.21
5.12
4.29
4 1/8
K
L
4.125
4.125
3.557
3.905
11.7
12.0
6.51
5.38
Maximum Spacing Between Pipe
Supports for Copper Tubing
Nominal (OD)
Diameter
Max. Span
in Ft.
5/8
7/8
1 1/8
1 3/8
1 5/8
2 1/8
2 5/8
3 1/8
3 5/8
4 1/8
5
6
7
8
9
10
11
12
13
14
{
Based on ASTM B-88 standard
Section 1 page .. 10
Suva
Weight of Refrigerant in Copper Tubing
®
refrigerants
Pounds per 100 feet of Type K & L Tubing
( Weight at 77ºF / 25ºC )
Flow Area
Tube O.D. (2) sq. in
1/2
5/8
3/4
7/8
1 1/8
1 3/8
1 5/8
2 1/8
2 5/8
3 1/8
3 5/8
4 1/8
K
L
K
L
K
L
K
L
K
L
K
L
K
L
K
L
K
L
K
L
K
L
K
L
Cu ft /
100ft
R-12
81.84 2.32
L (1) V
R-134a
R-401A
R-402A R-404A R-407C
74.53
L
R-22
2.76
V
72.16
L
R-500
2.29
V
75.95
L
R-502
4.16
V
75.28
L
2.02
V
74.52
L
1.81
V
71.86
L
4.32 65.45 4.00
V
L (3) V
R-410A
70.80
L
2.62
V
66.32
L
4.12
V
0.127
0.145
0.088
0.101
7.2
0.20
6.6
0.24
6.4
0.20
6.7
0.37
6.6
0.18
6.6
0.16
6.3
0.38
5.8
0.35
6.2
0.23
5.8
0.36
8.3
0.23
7.5
0.28
7.3
0.23
7.7
0.42
7.6
0.20
7.5
0.18
7.3
0.44
6.6
0.40
7.2
0.26
6.7
0.42
0.218
0.233
0.334
0.348
0.436
0.484
0.778
0.825
1.217
1.257
1.723
1.779
3.014
3.095
4.657
4.772
6.637
6.812
8.999
9.213
11.684
11.977
0.151
0.162
0.232
0.242
0.303
0.336
0.540
0.573
0.845
0.873
1.197
1.235
2.093
2.149
3.234
3.314
4.609
4.731
6.249
6.398
8.114
8.317
12.4
0.35
11.3
0.42
10.9
0.35
11.5
11.3
0.27
10.9
0.65
9.9
0.60
10.7
0.40
10.0
0.62
0.65
11.5
0.42
10.7
0.67
0.61
15.4
0.96
0.63 11.4
0.31
13.3
0.38
12.1
0.45
11.7
0.37
11.7
0.67 12.2
12.1
0.29
11.6
0.70
10.6
19.0
0.54
17.3
0.64
16.7
0.53
17.6
0.97
17.5
0.47
17.3
0.42
16.7
1.00
15.2
0.93
16.4
19.8
0.56
18.0
0.67
17.5
0.55
18.4
1.01
18.2
0.49
18.0
0.44
17.4
1.05
15.8
0.97
17.1
0.63
16.0
1.00
24.8
0.70
22.6
0.84
21.9
0.69
23.0
1.26
22.8
0.61
22.6
0.55
21.8
1.31
19.8
1.21
21.5
0.79
20.1
1.25
27.5
0.78
25.0
0.93
24.2
0.77
25.5
1.40
25.3
0.68
25.0
0.61
24.1
1.45
22.0
1.34
23.8
0.88
22.3
1.38
2.16
38.2
1.41
0.37
44.2
1.25
40.2
1.49
39.0
1.24
41.0
2.25
40.7
1.09
40.2
0.98
38.8
2.33
35.3
35.8
2.22
46.9
1.33
42.7
1.58
41.3
1.31
43.5
2.38
43.1
1.16
42.7
1.04
41.2
2.48
37.5
2.29
40.7
1.50
38.0
2.36
69.2
1.96
63.0
2.33
61.0
1.94
64.2
3.52
63.6
1.71
63.0
1.53
60.7
3.65
55.3
3.38
59.8
2.21
56.0
3.48
71.4
2.03
65.1
2.41
63.0
2.00
66.3
3.63
65.7
1.76
65.1
1.58
62.7
3.77
57.1
3.49
61.8
2.29
57.8
3.60
97.9
2.78
89.2
3.30
86.4
2.74
90.9
5.00
90.1
2.42
89.2
2.17
86.0
5.17
78.3
4.79
84.7
3.14
79.4
4.93
100.1
2.87
92.0
3.41
89.1
2.82
93.8
5.14
93.0
2.49
92.0
2.24
88.7
5.33
80.8
4.94
87.4
3.24
81.9
5.09
171.3
4.86 156.0
5.78 151.0
4.79
159.0
8.71 157.6
4.23 156.0
3.79 150.4
9.04
137.0
8.37 148.2
5.48 138.8
8.62
175.9
4.99 160.2
5.93 155.1
5.93
163.2
8.94 161.8
4.34 160.1
3.89 154.4
9.28
140.7
8.60 152.1
5.63 142.5
8.85
264.7
7.50 241.0
8.93 233.4
7.41 245.6 13.45 243.5
6.53 241.0
5.85 232.4
13.97
211.7 12.94
229.0
8.47 214.4
13.32
7.59 251.7 13.79 249.5
6.69 247.0
6.00 238.1
14.32
216.9 13.26
234.6
8.68 219.8
13.65
9.31 343.5
8.34 331.2
19.90 301.7 18.43 326.3 12.10 305.7
18.99
271.2
7.69 247.0
9.15 239.1
377.2
10.70 343.5
12.72 332.6
10.55
350.1 19.17
347.0
387.2
10.98 352.6
13.06 341.4
13.06
359.3 19.68
356.1
9.56 352.6
8.56 340.0
20.43 309.6 18.92 345.0 12.40 313.8
19.49
511.4
14.50 465.7
17.25 450.9
14.31 474.6 25.99 470.4
12.62 465.7
11.31 449.1
26.99 409.0 25.00 442.4
16.37 414.4
25.75
26.36
523.6
14.84 476.8
17.66 461.7
14.65 485.9 26.62 481.6
12.92 476.8
11.58 459.8
27.64 418.7 25.59 453.0
16.76 424.3
664.0
18.82 604.7
22.39 585.5
18.58
616.3 33.75 610.8
16.39 604.7
14.68 583.1
35.10 531.1 32.46 547.5
21.26 538.1
33.43
680.7
19.30 619.9
22.95 600.2
19.05
631.7 34.60 626.1
16.80 619.8
15.05 597.7
35.93 544.3 33.27 588.8
21.79 551.6
34.27
NOTES: (1). L ... saturated liquid & density, V ... saturated vapour & density, (2). Copper Tubing as per ASTM – B88, (3). for R-507 use R-404A values
Section 1 page .. 11
Suva
Refrigerant Receivers
®
refrigerants
( R-22 capacities at 90º F and 90% full. )
Density of R-22 at 90º F is 72.71 lbs per cubic foot
Vertical Receivers
Horizontal Receivers
( R-22 capacity in lbs. )
( R-22 capacity in lbs. )
Dia. length lbs.
Dia. length lbs.
Dia.
3.5 x 7.5 = 2
3.5 x 10 = 3
5
x 28 = 18
9 3/4 x 22 = 51
6
6
x 30 = 28
x 36 = 34
10 3/4 x
10 3/4 x
10 3/4 x
10 3/4 x
10 3/4 x
36
48
60
72
96
=
=
=
=
=
105
142
179
216
290
12 3/4 x
12 3/4 x
12 3/4 x
12 3/4 x
48
60
72
96
=
=
=
=
196
248
299
404
4
x 10
= 4
5
5
x 10
x 20
= 6
= 13
6 5/8 x 38 = 43
length
lbs.
7 5/8 x 28 = 41
6
6
6
6
x
x
x
x
12
18
24
30
=
=
=
=
10
16
22
28
8 5/8
8 5/8
8 5/8
8 5/8
8 5/8
Note: Dia. and Length are in inches
x
x
x
x
x
28
36
42
48
60
= 53
= 69
= 81
= 93
= 117
Dia. length lbs.
14
14
x 72 = 363
x 96 = 489
16
16
16
x 60 = 388
x 72 = 470
x 96 = 633
18
x 72 = 597
20
20
20
x 72 = 736
x 84 = 866
x 96 = 996
Note: Dia. and Length are in inches
For alternate refrigerant storage capacities in pounds for R-22 rated receivers
multiply the rated capacity by the following conversion factors.
Example: A receiver that measures 12 3/4" x 72" has a R-22 rated capacity of 299 lbs.
What is its revised capacity if this receiver is used with R-407C ?
299 lbs x 0.9473 = 283 lbs.
R-22 ...
R-123 ...
R-124 ...
R-134a ...
1.0000
1.2405
1.1425
1.0114
R-401A
R-401B
R-402A
R-402B
...
...
...
...
0.9927
0.9920
0.9293
0.9433
R-404A
R-407C
R-408A
R-409A
...
...
...
...
0.8682
0.9473
0.8853
1.0278
R-410A ... 0.8794
R-507 ... 0.8674
Notes: Receivers capacities source .... Standard Refrigeration Company.
All dimensions are expressed in inches and all weights are expressed in pounds.
Densities sourced from E.I. DuPont Thermodynamic Tables,
R-507 ... AlliedSignal Inc., computer program,
R-408A and R-409A ... Elf Atochem, computer program.
Section 1 page .. 12
Suva
Temperature / Pressure Chart Complete
Range of Temperature Applications
High, Medium and Low Temperature Applications
ºF
R-12
R-22
R-502
R-134a
R-404A
R-407C
®
refrigerants
Very Low Temperature Applications
R-410A
R-507
ºC
ºF
R-13
R-503
R-508B
ºC
-50
-45
-40
-35
-30
16”
14”
11”
9”
6”
7”
3”
0
2
5
0
2
9
4
7
19”
17”
15”
13”
10”
1
4
5
8
11
0
3
5
7
10
3”
1
3
5
8
11”
8”
5”
1”
1
6
9
12
15
19
1
3
6
8
11
-46
-43
-40
-37
-34
-200
-195
-190
-185
-180
-129
-126
-123
-121
-118
-25
-20
-15
-10
-5
2”
1
2
5
5
7
10
13
16
20
12
15
19
22
27
7”
4”
0
2
4
14
17
21
25
29
13
16
20
24
28
10
14
17
21
25
4
6
9
12
15
23
28
32
38
44
15
18
22
26
31
-32
-29
-26
-23
-21
-175
-170
-165
-160
-155
-115
-112
-109
-107
-104
0
5
10
15
20
9
12
15
18
21
24
28
33
38
43
31
36
41
46
52
7
9
12
15
19
34
39
45
51
57
33
38
44
49
56
29
34
39
44
50
19
23
27
32
37
50
57
64
72
80
35
41
46
52
59
-18
-15
-12
- 9
- 7
-150
-145
-140
-135
-130
25
30
35
40
45
25
29
33
37
42
49
55
62
69
76
59
66
73
81
89
22
26
31
35
40
64
71
79
87
96
63
70
78
86
95
57
64
71
79
87
43
48
55
62
69
89
99
109
121
132
66
73
81
90
99
- 4
- 1
2
4
7
-125
-120
-115
-110
-105
50
55
60
65
70
47
52
57
64
70
84
93
102
111
122
98
107
117
127
138
46
52
58
64
71
106
116
126
138
150
104
114
125
136
148
96
106
116
127
139
77
86
95
104
115
145
158
173
188
204
108
119
129
141
153
10
13
16
18
21
75
80
85
90
95
77
84
92
100
108
132
144
156
168
182
149
161
174
187
201
79
87
95
104
114
162
176
190
205
220
160
177
188
203
218
151
163
177
191
206
126
138
150
164
178
221
238
257
277
298
166
180
194
210
226
100
105
110
115
120
117
127
136
147
158
196
210
226
242
260
216
232
248
265
282
124
135
146
158
171
237
254
273
292
312
235
252
271
290
310
222
239
257
275
294
193
209
225
243
262
320
344
368
394
421
125
130
135
140
145
169
181
193
207
220
278
296
316
337
359
301
321
341
363
385
184
199
213
229
246
333
355
378
403
428
331
353
377
401
422
315
336
358
381
405
282
302
324
347
372
445
479
510
543
577
Bubble / Dew
16”
13”
10”
6”
2”
18”
15”
12”
8”
4”
-101
- 98
- 96
- 93
- 90
9”
5”
1”
2
5
1
4
7
10
13
0
3
6
9
13
- 87
- 84
- 82
- 79
- 76
-100
-95
-90
-85
-80
7
11
14
18
23
17
22
26
32
38
17
21
26
32
38
- 73
- 71
- 68
- 66
- 62
24
27
29
32
35
-75
-70
-65
-60
-55
27
32
38
44
51
44
51
58
67
75
45
52
60
68
77
- 59
- 57
- 54
- 51
- 48
243
261
280
300
322
38
41
43
46
49
-50
-45
-40
-35
-30
58
65
74
82
92
85
95
107
119
132
87
98
110
122
135
- 46
- 43
- 40
- 37
- 34
344
368
392
418
446
52
54
57
60
63
-25
-20
-15
-10
-5
102
113
124
136
149
146
160
176
193
211
150
165
181
198
217
- 32
- 29
- 26
- 23
- 21
Bubble / Dew
Note: Pressure / ºC temperature values are rounded off to the nearest whole number, and the values are expressed in PSIG or inches Hg.
Section 1 page .. 13
Suva
®
refrigerants
Refrigerant Line Identification
Condenser
Liquid
Condensate line
Roof Line
Hot Gas Binding Line
Discharge Line
Receiver
Liquid Line
Hot Gas By-pass Line
Liquid
By-pass line
Compressor
Hot Gas
Defrost Line
TXV
Suction Line
Evaporator
Section 1 page .. 14
Typical Refrigeration Piping Schematic
TXV
(
(
(
(
(
(
(
(
refrigerants
TXV
(
(
®
(
TXV
Suva
(
)
)
)
Evaporator # 1
S
Evaporator # 2
Evaporator #3
Refrigerant in use _______________________
Saturated Suction Temperature (SST) ________________________
Saturated Condensing Temperature (SCT) _____________________
Design Load ________
Minimum Load _______
Type L copper tubing and all long radius elbows
Filter / Drier
Air Cooled Condenser
(
(
(
(
(
(
Oil
separator
Receiver
Vapour Lines equivalent lengths;
Suction line ... H ______ , V ____ , R __/__
Discharge line ... H ______ , V ____ , R __/__
Hot Gas Defrost line ... H ______, V ______
Liquid Line equivalent lengths;
Liquid
line ... H ______, V ______, R __/__
Note: H is horizontal, V is vertical, R is riser
Section 1 page .. 15
Suva
®
Determining Total Equivalent Lengths
Suction Line
Equivalent
ft./unit
Discharge Line
Total Eq.
Feet
Equivalent
ft./unit
refrigerants
Liquid Condensate Line
Total Eq.
Feet
Quantity
Size
Equivalent
ft./unit
Total Eq.
Feet
Actual run of pipe in feet
(riser #1)
N/A
N/A
N/A
N/A
Actual run of pipe in feet
(riser #2)
N/A
N/A
N/A
N/A
Short radius elbows (1st)
N/A
N/A
N/A
N/A
Short radius elbows (2nd)
N/A
N/A
N/A
N/A
Long radius elbows (3rd)
N/A
N/A
N/A
N/A
Line Flow tee
N/A
N/A
N/A
N/A
Branch Flow tee
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Component Description Quantity
Size
Quantity
Size
Actual run of pipe in feet
(main)
Long radius elbows (1st)
Long radius elbows (2nd)
45º elbows
Globe / Solenoid valve
Angle / Check valve
Filter
N/A
N/A
N/A
N/A
Misc:
Equivalent length of
Suction Line
ft.
Equivalent length of
Discharge Line
ft.
Equivalent length of
Liquid Condensate Line
ft.
Sub total # 1
page 1 of 2
ft.
Section 1 page .. 16
Suva
®
Determining Total Equivalent Lengths
Liquid Line
Hot Gas Bypass Line
refrigerants
Hot Gas Defrost Line
Quantity
Size
Equivalent
ft./unit
Total Eq.
Feet
Quantity
Actual run of pipe in feet
(main #2)
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Sight glass / Moisture
Indicator
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Component Description Quantity
Size
Equivalent
ft./unit
Total Eq.
Feet
Equivalent
ft./unit
Size
Total Eq.
Feet
Actual run of pipe in feet
(main)
Short radius elbows (1st)
Short radius elbows (2nd)
Long radius elbows (1st)
Long radius elbows (2nd)
Long radius elbows (3rd)
Line Flow tee
Branch Flow tee
45º elbows
Globe / Solenoid valve
Angle / Check valve
Filter
Misc:
Equivalent length of
Liquid Line
ft.
Equivalent length of
Hot Gas Bypass Line
page 2 of 2
ft.
Equivalent length of
Hot Gas Defrost Line
ft.
Sub total # 2
ft.
Sub total 1 + 2 = GRAND TOTAL
ft.
Suva
®
refrigerants
Glossary of Terms …
ACR: Air Conditioning Refrigeration tubing, this tubing has been internally cleaned, sealed and presserized
with dry nitrogen. The specification are either type K or L copper tubing.
Access Fitting: a fittings that allows a means of accessing the internal pressures within a system.
Ancillary Devices: auxiliary devices pertaining to the system. Examples include but are not limited to the
following; sight glasses, mufflers, ORI/ORD, oil separators, receivers, accumulators etc:.
Base Trap: a " P " trap located at the foot of a riser or vertical lift.
Cap Tube: a fixed orifice metering device of various lengths and inside diameter.
Distributor: located after the TXV and will distribute refrigerant through various feeder tubes to actively
feed the refrigerant to the evaporator.
Fixed Orifice Device: various forms of metering devices such as; capillary tube, accurators, orifice plates etc:.
Hangers: devices that are located at a pre determined distance apart that support and secure the refrigerant
piping system.
Insulation: a material installed around the outside diameter of refrigerant tubing that retards the transfer of heat.
Inverted Loop: a loop at the top of a vertical rise that will turn the flow of refrigerant 180 degrees.
continued ….
Section 1 page .. 18
Suva
®
refrigerants
Glossary of Terms …
LR elbow: Long Radius elbow.
NRE: Net Refrigeration Effect. The refrigeration work completed in the evaporator.
OD: the Outside Diameter of the ACR refrigerant tubing being used or specified.
“ P ” Trap: a 180 degree return bend loop located at the bottom of a pipe riser to help insure oil return or help
prevent a liquid from settling on the heads of the compressor during it’s off cycle.
Piping: the act of doing / installing the required system piping or describing the completed piping system.
Pitch: the slope / grade, 1/2 inch per 10 feet, of the piping run that is pitched in the direction of refrigerant flow.
Pull Box: an enclosed box usually located in the floor, where joints are made when long runs of tubing are used.
SCT: Saturated Condensing Temperature.
Service Valves: valves so located that a service technician using the proper tools will have access to the
refrigeration circuit.
Side Inlet T: a device located after the thermostatic expansion valve, before the distributor that will allow
for the introduction of hot gas into the evaporator as a means of capacity control.
continued ….
Section 1 page .. 19
Suva
®
refrigerants
Glossary of Terms …
SR elbow: Short Radius elbow.
SST: Saturated Suction Temperature.
TEL: Total Equivalent Length, referring to the individual refrigerant piping run.
TEV / TXV: Thermostatic Expansion Valve.
THR: Total Heat of Rejection, usually the condensers capacity.
Tubing: the actual physical material of construction of a refrigerant piping system. This material
is usually ACR tubing and is measured / known by its outside diameter.
Section 1 page .. 20
Guide Notes:
Suva
®
refrigerants
______________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
______________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
______________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
Section 1 page .. 21
Guide Notes:
Suva
®
refrigerants
______________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
______________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
______________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
Section 1 page .. 22
Piping Losses
Section 2
Suva
®
refrigerants
Refrigerant Piping Losses
Section 2 page .. 1
Suva
®
refrigerants
Piping Losses … Section Two
Cause and Effect
…………….
page 3
Section 2 page .. 2
Suva
®
refrigerants
Cause and Effect of Pressure Drop
Pressure Loss Results in:
Decrease in Thermal Capacity
Increased Power Requirements
Section 2 page .. 3
Suva
®
Cause and Effect of Pressure Drop
refrigerants
Pressure drop occurs during fluid flow as a result of frictional forces within the fluid and frictional forces
between the moving fluid stream and the stationary pipe walls. The amount of pressure drop depends on a
number of variables, including:
*
*
*
*
type of flow, e.g., laminar, turbulent, etc.
physical properties of fluid, e.g., viscosity, density, etc.
pipe characteristics, e.g., diameter, roughness, etc.
velocity of flow in pipe
Pressure drop increases in proportion to the length of pipe. Pressure drop is also increased by anything
which disturbs the flow, such as valves, tees, elbows and other fittings.
compressor
liquid line
evaporator
manufacturer
manufacturer
condenser
system pressure
discharge line
TXV
system pressure
In refrigerant piping, some pressure drop occurs in both vapour and liquid lines. These pressure drops can
have a significant impact on system performance. The effect of these pressure drops must be anticipated
and compensation made in the total design.
suction line
System pressures … actual pressure changes including the effects of pressure drop
Section 2 page .. 4
Nomographs
Section 3
Suva
®
refrigerants
Refrigerant Piping Nomograph’s
Section 3 page .. 1
Suva
®
refrigerants
Nomographs … Section Three
What is a nomograph
…………….
page 3
………………
page 4
Velocity nomograph ………………
page 5
Pressure nomograph ………………
page 6
Using a nomograph
Section 3 page .. 2
Suva
®
refrigerants
Nomograph
A graph having three parallel straight lines, each graduated for a different
variable so that a straight line cutting all three intersects the related values
of each variable. A chart representing numerical relationships.
Before using a refrigerant nomograph you must know the following facts:
*
*
*
*
*
*
The system refrigerant type (example R-22)
System design capacity (example 6.0 tons)
Saturated Suction Temperature (SST) (example - 20° F)
Saturated Condensing Temperature (SCT) (example 100° F)
Maximum allowable pressure drop for each refrigeration line
Minimum allowable velocity for each refrigeration line
Continued …….
Section 3 page .. 3
Suva
®
refrigerants
Nomograph
Using the Refrigerant Pressure Drop or Velocity Nomograph
1. Select the proper nomograph chart.
2. Enter at the design refrigeration capacity at the top of the chart.
3. From the refrigeration capacity location drop vertically until
intersecting the saturated evaporator temperature (SST) line,
the discharge lines and ending at the saturated liquid line.
4. At this evaporator temperature location draw a horizontal line
intersecting the diagonal tubing lines.
5. Select the desired pressure drop or velocity on the saturated
condensing temperature line at the bottom of the chart and draw
a vertical line to intersect the previously drawn horizontal line.
6. Select the proper suction line tubing size from where these two
lines intersect.
7. Confirm the pressure drop in psi per 100 feet or velocity of selected
tubing just below the saturated condensing temperature (SCT) line.
8. Repeat the above outline steps for the discharge and liquid lines.
Section 3 page .. 4
Refrigeration Capacity
Ton of refrigeration
0.1 0.5 1 2 4 6 10 20 40 60 100
Nomograph
3/8
15
/8
O.
13
D.
/
8
11
typ
/8
eL
7/8
co
pp
3/4
er
5/8
tub
i ng
1/2
{
" Velocity "
Evaporator Temperature
ap
Ev
-6
0F
-
at
or
or
te
m
re
tu
ra
e
p
|
Example
F
40
Discharge Line
0F
- 2 0F
e
F
20 F
40
e
rg
lin
ha
isc
D
Liquid Line
NOTE: This is a graphic
representation only, use
specific nomograph for
specified refrigerant
2000
4000
6000
8000
10000
200
400
600
800
1000
40
60
80
100
Li
qu
i
d
lin
e
Refrigerant Line Sizes
Load 17 tons {
SST = 0° F |
SCT = 120° F }
Design Liquid line is 200 fpm
Design Suction line is 2000 fpm
Liquid line is 1/2 inch
Suction line is 7/8 inch
At 80° F Condensing
At 100° F Condensing
Refrigerant Velocity
At 120° F Condensing
2000
4000
6000
8000
10000
200
400
600
800
1000
60
80
100
}
Condensing Temperatures
Velocity in feet / minute
Section 3 page .. 5
Refrigeration Capacity
Ton of refrigeration
0.1 0.5 1 2 4 6 10 20 40 60 100
Nomograph
{
21
/8
25
/8
31
/8
" Pressure "
Example
15
/8
Eva
p
O.
D.
orat
typ
or t
eL
emp
cop
per
erat
ure
tub
i ng
Evaporator Temperature
Discharge Line
e
e lin
harg
Disc
7/8
13
/8
11
/8
- 60
- 40 ° F
- 20 ° F
0° F ° F
20
40°° F
F
|
20
40
60
80
100
2
4
6
8
10
0.6
0.8
1
3/8
1/2
Refrigerant Line Sizes
Liqu
i
5/8
d lin
e
3/4
Liquid Line
Load 20 tons {
SST = minus 20° F |
SCT = 100° F }
Suction line ˜P < 1.5 psi / 100 ft.
Liquid line ˜P < 7.5 psi / 100 ft.
Suction line is 1 5/8 inch
Liquid line is 5/8 inch
Note: is this case the liquid line
pressure drop would be okay if
liquid line was only 20 ft. Long.
NOTE: This is a graphic
representation only, use
specific nomograph for
specified refrigerant
At 80° F Condensing
}
Pressure drop
At 100° F Condensing
Condensing Temperatures
20
40
60
80
100
2
4
6
8
10
0.6
0.8
1
At 120° F Condensing
Pressure drop in psi per 100 feet
Section 3 page .. 6
Piping Procedures
Section 4
Suva
®
refrigerants
Piping Procedures
Refrigerant piping should be designed and installed to accomplish the "Design Goals"
as outlined in this Refrigerant Piping Handbook.
Section 4 page .. 1
Suva
®
refrigerants
Piping Procedures … Section Four
Recommended Procedure …………….
page 3
Heat Rejection Factors
………...…..
page 5
Double Risers …………….…..………
page 6
Double Riser Examples ………………
page
7
Typical Condenser Piping ……………
page
8
Liquid Condensate Piping ……………
page 10
Effects of Height on Pressure ………..
page 11
Pipe Hanger Spacing …………………
page 12
Section 4 page .. 2
Recommended Procedure for Determining the Proper Refrigerant
Pipe Sizes for Typical Refrigeration and Air Conditioning Systems
To carry out these objectives you will require the following:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
This check list.
A pressure / temperature chart for the specified refrigerant.
DuPont’s Refrigerant Piping "Quick Pick" Handbook.
The minimum and maximum design load conditions for this specific refrigeration / air conditioning
system.
Obtain the saturated suction temperature, saturated condensing temperature for this specific system.
Determine the maximum allowable pressure drops expressed in psig for this specific refrigerant
at the stated design conditions.
Using the accepted industry standard of plus 50 %, determine the approximate equivalent length by
making a reasonable estimate of the total equivalent length of tubing for each piping run.
Find the preliminary tubing size for each selected piping run.
Determine the actual equivalent tube length of each piping run including its fittings and
ancillary devices.
Calculate the allowable pressure drop based on a maximum of 2 F degrees for suction vapour
lines and 1 F degree for liquid lines.
Add the actual tube length plus the equivalent lengths for all the various fittings and components
for each individual pipe run.
continued …...
Section 4 page .. 3
Recommended Procedure for Determining the Proper Refrigerant
Pipe Sizes for Typical Refrigeration and Air Conditioning Systems
continued …...
12. Select the suggested tube size from the appropriate "Quick Pick" table for the
desired pipe run.
13. Divide the total equivalent length obtained in step 11 above into 100 and multiply by the
allowable pressure drop, to determine the pressure drop per 100 feet for the selected line
size. Note: the DuPont pressure drop charts are based on 100 feet.
14. If desired plot the actual design situation of the appropriate refrigerant pressure
drop and velocity chart. Keep in mind that the pressure drop chart is based on 100
equivalent feet per selected piping run.
15. When the actual pressure drop per 100 feet is determined, divide 100 into the calculated
tubing length and multiply by the actual pressure drop per 100 feet. The result will be the
actual pressure drop of this selected piping run. The sum of these pressure drops per piping
run will determine the total system friction losses.
The above outlined procedure is for FULL LOAD conditions. For part load conditions always
check your pipe run to insure that you have maintained the minimum recommended velocity of
1500 feet per minute. Keep in mind that double risers can be used on either or both the Hot Gas
Discharge Line and the Suction Line to maintain the minimum acceptable velocity of 1500 feet
per minute when PART LOAD conditions exist.
Section 4 page .. 4
Suva
®
Heat Rejection Factors
refrigerants
Condenser Load = Compressor Capacity x Factor
If heat of rejection figures are not obtainable from the compressor manufacturer, the factors shown in the table
below may be used to determine the Total Heat of Rejection (THR).
For systems outside the normal limits of single stage compressor applications, such as compound and cascade
refrigeration systems, the following formulae may be used to arrive at the Total Heat of Rejection requirements
for the selection of the condenser:
Open Compressors:
Total Heat of Rejection = Compressor Capacity (Btuh) + (2545 x BHP).
Suction cooled Hermetic Compressors:
Total Heat of Rejection = Compressor Capacity (Btuh) + (3413 x kW).
Evaporator
Temperature
Condensing Temperature
90° F (32° C)
°F
°C
Open
-30
-20
-10
0
10
20
30
40
50
-34
-29
-23
-18
-12
- 7
- 1
4
10
1.37
1.33
1.28
1.24
1.21
1.17
1.14
1.12
1.09
Herm
1.57
1.49
1.42
1.36
1.31
1.26
1.22
1.18
1.14
100° F (38° C)
110° F (43° C)
120° F (49° C)
Open
Herm
Open
Herm
Open
1.42
1.37
1.32
1.28
1.24
1.20
1.17
1.15
1.12
1.62
1.53
1.46
1.40
1.34
1.29
1.25
1.21
1.17
1.68
1.58
1.50
1.44
1.38
1.33
1.28
1.24
1.20
*
1.47
1.42
1.37
1.32
1.28
1.24
1.20
1.17
1.47
1.42
1.37
1.32
1.28
1.24
1.20
1.17
1.14
130° F (55° C)
140° F (60° C)
Herm
Open
Herm
Open
Herm
*
1.65
1.57
1.50
1.43
1.37
1.32
1.27
1.23
*
*
1.47
1.41
1.36
1.32
1.27
1.23
1.20
*
*
1.64
1.56
1.49
1.43
1.37
1.31
1.26
*
*
*
1.47
1.42
1.37
1.32
1.28
1.24
*
*
*
1.62
1.55
1.49
1.42
1.35
1.29
Notes:
* Outside normal limits of single stage compressor applications.
For two stage applications use formulae shown above.
Section 4 page .. 5
Suva
®
refrigerants
Double Risers
A double riser gives the effect of a downsized riser at minimum load, while providing about the
same pressure drop as a full sized line at full load. The smaller riser is sized to insure oil return
at the minimum capacity step; the larger riser is sized so that the combined “flow areas” of both
of these risers are approximately equal to the main suction or discharge line.
1 5/8
7/8
Riser # 2
1 3/8
Riser # 1
Evaporator
Full load capacity
OD
area
7/8
1 1/8
1 3/8
1 5/8
2 1/8
2 5/8
3 1/8
(0.48)
(0.83)
(1.26)
(1.78)
(3.10)
(4.77)
(6.81)
Minimum capacity ≥ 33 %
Riser #1
3/4
7/8
1 1/8
1 3/8
1 5/8
2 1/8
2 5/8
Riser #2
& 1/2
& 3/4
& 7/8
& 7/8
& 1 3/8
& 1 5/8
& 1 5/8
area
(0.49)
(0.83)
(1.31)
(1.74)
(3.04)
(4.88)
(6.55)
Notes:
1 5/8
" P " trap size
equals full load
piping size with
minimum internal
volume.
* Systems that have capacity control between 33 % and 100 %
of their rated capacity can maintain a minimum refrigerant
velocity of 1500 fpm in vertical risers by using the above
refrigerant double riser selection table.
* All tubing sizes stated are nominal outside diameter (OD),
type “L” copper.
* Area refers to cross sectional tubing area expressed in
square inches.
* Suggested maximum riser height is 20 ft. for refrigeration
applications, 25 to 30 ft. increments for air conditioning
applications. As the saturated suction temperature goes
down, riser lengths also get shorter.
Section 4 page .. 6
Suva
®
refrigerants
Double Riser Examples
Example # 1.
Example # 2.
Refrigerant: R-404A or R-507
SST minus 20° F
SCT 100° F
Design load 7.5 tons
Minimum load … N/A
Piping runs:
evaporator to compressor = 50 ft
compressor to condenser = 30 ft
condenser to receiver = 30 ft
receiver to evaporator = 50 ft
Refrigerant: R-134a
SST plus 35° F
SCT 100° F
Design load 5 tons
Minimum load 2/3 design
Piping runs:
evaporator to compressor = 50 ft
compressor to condenser = 30 ft
condenser to receiver = 30 ft
receiver to evaporator = 50 ft
Piping runs:
evaporator to compressor = 2 1/8
evaporator riser … N/A
compressor to condenser = 1 1/8
compressor riser … N/A
condenser to receiver = 3/4
receiver to evaporator = 5/8
Notes:
SST is Saturated Suction Temperature
SCT is Saturated Condensing Temperature
N/A is Not Applicable
Piping runs:
evaporator to compressor = 1 3/8
evaporator riser = 1 1/8 + 7/8
compressor to condenser = 7/8
compressor riser … N/A
condenser to receiver = 5/8
receiver to evaporator = 5/8
Example # 3.
Refrigerant: R-407C
SST plus 40° F
SCT 105° F
Design load 15 tons
Minimum load 50/50 of design
Piping runs: .. condenser located above
evaporator to compressor = 25 ft
compressor to condenser = 20 ft
condenser to receiver … no receiver
condenser to evaporator = 45 ft
Piping runs:
evaporator to compressor = 1 5/8
evaporator riser = 1 3/8 + 7/8
compressor to condenser = 1 1/8
compressor riser = 7/8 + 3/4
condenser to receiver … no receiver
receiver to evaporator = 3/4
Notes:
1 psi will support 1.8 ft typical refrigerant
1 psi will support 2.3 ft H2O
1 psi will support 2.5 ft typical oil
Section 4 page .. 7
Suva
®
refrigerants
Typical Condenser Piping Arrangements
Condensers above compressor and receiver
Condenser
Condenser
Riser # 2
Riser # 1
Discharge line
Liquid condensate line
Discharge lines
Liquid condensate line
Receiver
Single Riser
Receiver
Double Riser
Section 4 page .. 8
Suva
®
Typical Condenser Piping Arrangements
refrigerants
Discharge lines
Condenser
Liquid condensate line
Receiver
Equipment on Same Level
Section 4 page .. 9
Suva
®
Typical Liquid Condensate Piping
refrigerants
Condenser
Liquid Down
Note sizing …
Discharge lines
Liquid condensate line is
" bi-flow " construction,
generally one tubing size
larger then liquid line.
Vapour Up
Liquid line to evaporator
Receiver
Section 4 page .. 10
Suva
®
Typical Hot Gas Binding Line
refrigerants
Condenser
Liquid Down
Liquid condensate Line
Discharge lines
Check Valve in Hot Gas Binding Line
Vapour Up
Liquid line to evaporator
Receiver
Notes:
This Hot Gas Binding line is needed on installations using an
evaporative condenser or on air cooled condensers where the
receiver is located where it can become warmer than the
condenser. For example having the condenser on the roof and
its receiver located on an inside mezzanine below the condenser.
Section 4 page .. 11
Suva
®
Typical Effects of Height on Pressure
Vapour riser / drop
Vapour pressure
of 34.1 psig at
top of pipe
Liquid riser / drop
Liquid pressure
is 236.7 psig at
top of pipe
" Lift " of 30 ft.
Pressure due to weight of
30 ft. column of vapour
at 0° F is 0.2 psig
refrigerants
Specifications:
R-404A
SST is 0° F
SCT is 100° F
Vapour pressure
of 33.9 psig at
bottom of pipe
Pressure due to weight of
30 ft. column of liquid
at 100° F is 16.7 psig
Liquid pressure
is 253.4 psig at
bottom of pipe
A factor affecting liquid lines is the
effect of a change in height or elevation.
This factor is usually of negligible
importance in vapour lines where the
weight of the fluid is low enough so that
it has minimal impact on the total pressure
of a column of vapour. In liquid line,
though, the fluid is quite dense. The weight
of the liquid produces a significant change
in the pressure from the top to the bottom
of the column of fluid. Fluorocarbon
refrigerant, typically, produces about 1
pound change in pressure for every 1.8 feet
of liquid height.Where the flow proceeds
from a higher level to a lower level, the
weight of the liquid column adds to the
refrigerant pressure at the end of the line,
therefore increases the ˜P across the
expansion device. However, where the flow
proceeds from a lower level to a higher level,
pressure is lost, there by resulting in the
flashing of liquid refrigerant in the liquid line.
Notes:
1 psi will support 1.8 ft typical refrigerant
1 psi will support 2.3 ft H2O
1 psi will support 2.5 ft typical oil
Section 4 page .. 12
Suva
®
refrigerants
Recommendation for Pipe Hanger Spacing
Maximum Spacing Between Pipe
Supports for Copper Tubing
Nominal (OD)
Diameter
Max. Span
in Ft.
5/8
7/8
1 1/8
1 3/8
1 5/8
2 1/8
2 5/8
3 1/8
3 5/8
4 1/8
5
6
7
8
9
10
11
12
13
14
{
1967 ASHRAE Guide and Data Book
{ Maximum allowable hanger distance
as per CSA B52 code
Section 4 page .. 13
Expansion / Contraction
Section 5
Suva
®
refrigerants
Refrigerant Piping Expansion and Contraction
Section 5 page .. 1
Suva
®
refrigerants
Expansion / Contraction … Section Five
Expansion / Contraction …………….
page 3
Section 5 page .. 2
Suva
®
Refrigerant Piping Expansion and Contraction
refrigerants
All refrigeration piping materials are subject to changes in temperature and will expand and contract
with temperature change. Installation techniques must allow for expansion and contraction changes,
this will prevent stresses which may buckle and rupture the copper tube or joints.
The average coefficient of expansion of copper is 0.0000104 inch/per inch/per degree F. Copper tubing
will expand about 1 1/4 inches per 100 feet per 100F° change in temperature. For example a copper line
75 feet long is used to carry hot discharge refrigerant vapour at 225° F to the systems condenser. The
change in temperature could be 155F°, that is 225 - 70 (room ambient). The expected expansion on this
application could very well be 75 x 12 x 0.0000104 x 155 = 1.451 or 1.5 inches.
There are two common methods of taking care of expansion and contraction in copper lines used in the
refrigeration industry. These are the use of “expansion loops” or “pipe offsets”. See figures 1 and 2 for
specifics on these two methods.
In the installation of expansion loops, the expansion member should be “cold sprung” approximately
one-half the estimated travel expected. In this manner the bend is subject to only about one-half of the
stress when the line is at the highest temperature, than it would be if the loop were installed in its natural
position.
Care must be taken during the installation of the lines to maintain perfect alignment, if not, there will be
a tendency for the lines to bow, and possibly buckle or rupture, particularly on the smaller sizes.
Continued …...
Section 5 page .. 3
Suva
®
refrigerants
Refrigerant Piping Expansion and Contraction
Continued …...
It is often possible to provide for expansion by offsetting the pipe line rather than to continue in a
straight line. This method can be used only where there is plenty of space available. A single offset
using two 90° elbows should have a minimum length of not less than three times the radius required
in an expansion loop. The legs of the offset should not be spaced less than two times the radius from
each other, see figure 2. This method is just as effective as expansion loops and can be made on the
job, see table 1 for fabrication details. Offsetting by means of long radius allows the installer to vary
the length to suit the job. Due to the amount of labour involved in the fabrication of expansion loops
they are considered more expensive than offsets made up on the job.
So far we have referred only to main lines in general; these are usually thought of as horizontal.
Vertical lines or risers must also be considered in the same manner. Risers should have adequate
support at or near the bottom. Where branch lines to fixtures are taken off they should be sufficiently
long to take care of any movement in the main.
Rigid fixtures should never be directly connected to risers. One or two turns or elbows in the line will
take care of the short branches. Copper tubing may not break as readily, but if continually subjected
to strain and bending it will ultimately fail. Designers and contractors must always keep the matter of
expansion and contraction in mind.
Continued …...
Section 5 page .. 4
Suva
®
Refrigerant Piping Expansion and Contraction
refrigerants
A freezer operating at a SST of minus 30° F and 100ft from
the mechanical room which is 70° F, the compressor discharge
temperature is 225° F and the condenser 75ft away.
Suction “shrinkage” is 0.0000104 x 12 x 100 x 100 = 1.248 or 1 1/4 inches.
Discharge expansion is 0.0000104 x 12 x 75 x 155 = 1.451 or 1 1/2 inches.
Note:
1. All radii are referenced to the centre line of pipe.
2. “L“ length of pipe is referenced to the total length
measured along the centre line of the bent pipe.
Total expansion and contraction movement in this freezer application would
be 1 1/4 + 1 1/2 = 2 3/4 inches. The installation and servicing contractor
must be aware of the potential problems that could arise if these factors are
not taken into consideration in the original installation.
Note example .. Suction .. 0.0000104 /inch x 12" x 100 ft x ˜100° F = 1.248 inches
Figure 1: Expansion Loop ( U-Bend )
Table 1
Tube
OD
For travel of ...
1/2 "
1"
Radius - R - inch
1 1/2 "
2"
2 1/2 "
3"
4"
7/8
10
15
19
22
25
27
30
1 1/8
11
16
20
24
27
29
33
1 3/8
11
17
21
26
29
32
36
1 5/8
12
18
23
28
31
35
-----
2 1/8
14
20
25
31
34
-----
-----
2 5/8
16
22
27
32
-----
-----
-----
Offset with four (4) 90º LR elbows
3 1/8
18
24
30
34
-----
-----
-----
Figure 2: Offset and Return
4 1/8
20
28
34
-----
-----
-----
-----
Bends can be made from 20 feet or less of tubing
Note: bracket supports should be within six inches of a change of direction and opposite the source of vibration.
Section 5 page .. 5
Best Practices
Section 6
Suva
®
refrigerants
Best Piping Practices
Section 6 page .. 1
Suva
®
refrigerants
Best Piping Practices … Section Six
Liquid Line for Multi-case …………….
page 3
Split A/C system …..…………………..
page
6
Multi-Evaporators Hot Gas ……………
page
9
Liquid Line Stacked Evaporators …..…
page 12
Multi-Circuited Condenser …………...
page 15
Section 6 page .. 2
Suva
®
Refrigerant Piping Practices
refrigerants
Liquid Line Piping for Multi-case Hot Gas Defrost
Case coil
Case coil
Case coil
A
Liquid Line
Case coil
Case coil
Case coil
B
Liquid Line
Denotes TXV
Continued …...
Section 6 page .. 3
Suva
®
Refrigerant Piping Practices
refrigerants
Liquid Line Piping for Multi-case Hot Gas Defrost
Case coil
Case coil
Case coil
A
Liquid Line
Case coil
Case coil
Case coil
B
Liquid Line
Denotes TXV
Continued …...
Section 6 page .. 4
Suva
®
Refrigerant Piping Practices
refrigerants
Liquid Line Piping for Multi-case Hot Gas Defrost
Case coil
Case coil
Case coil
A
NO
Liquid Line
“A” is not recommended because of liquid hammer also expansion and contraction will “work” the elbow and cause a failure.
Case coil
Case coil
Case coil
B
8 inch
minimum
Liquid Line
“B” is recommended because liquid hammer will not effect the fittings also expansion and contraction will take place on liquid header not the branch fittings.
Denotes TXV
Section 6 page .. 5
Suva
®
Refrigerant Piping Practices
refrigerants
Split A/C system, 100 ft apart, evaporator above condensing unit
Evaporator coil
A
Evaporator coil
B
Condensing unit
Condensing unit
Denotes TXV
Continued …...
Section 6 page .. 6
Suva
®
Refrigerant Piping Practices
refrigerants
Split A/C system, 100 ft apart, evaporator above condensing unit
90 feet
Evaporator coil
A
Evaporator coil
B
Condensing unit
10 feet
Condensing unit
Denotes TXV
Continued …...
Section 6 page .. 7
Suva
®
Refrigerant Piping Practices
refrigerants
Split A/C system, 100 ft apart, evaporator above condensing unit
Evaporator coil
90 feet
A
Condensing unit
10 feet
Note: 100 feet of 7/8 tubing will hold 25 pounds of liquid R-22 refrigerant.
“A” is not recommended because 90 ft of liquid refrigerant (90 % of 25 = 22.5 lbs) will drain on off cycle into condensing unit, damage compressor on start-up.
10 feet
Evaporator coil
B
Condensing unit
90 feet
Note: 100 feet of 7/8 tubing will hold 25 pounds of liquid R-22 refrigerant.
“B” is recommended because only 10 ft of liquid refrigerant (10 % of 25 = 2.5 lbs) will drain on off cycle into condensing unit, less chance of damage on start-up.
Denotes TXV
Section 6 page .. 8
Suva
®
Refrigerant Piping Practices
refrigerants
Same Circuit Multi Evaporators with Hot Gas Defrost
Evaporator
Evaporator
A
Hot Gas Defrost Line
Evaporator
Evaporator
B
Hot Gas Defrost Line
Denotes TXV
Continued …...
Section 6 page .. 9
Suva
®
Refrigerant Piping Practices
refrigerants
Same Circuit Multi Evaporators with Hot Gas Defrost
Evaporator
Evaporator
A
Hot Gas Defrost Line
Evaporator
Evaporator
B
Hot Gas Defrost Line
Denotes TXV
Continued …...
Section 6 page .. 10
Suva
®
Refrigerant Piping Practices
refrigerants
Same Circuit Multi Evaporators with Hot Gas Defrost
“A” is not recommended because
when the ‘Hot Gas” is off liquid
refrigerant can be feed from one
evaporator to the other evaporator.
Evaporator
Evaporator
A
Hot Gas Defrost Line
“B” is recommended because there
is a check valve in the Hot Gas line
leading to the side inlet “Tee”.
Thereby preventing liquid refrigerant
from entering the other evaporator
when Hot Gas defrost is not in use.
Evaporator
Evaporator
B
Hot Gas Defrost Line
Denotes TXV
Section 6 page .. 11
Suva
®
Refrigerant Piping Practices
A
Liquid Line Feed to Stacked Evaporator Coils
refrigerants
B
Evaporator
Evaporator
Evaporator
Evaporator
Evaporator
Evaporator
Condensing unit
Condensing unit
Receiver
Denotes TXV
Receiver
Continued …...
Section 6 page .. 12
Suva
®
Refrigerant Piping Practices
A
Liquid Line Feed to Stacked Evaporator Coils
refrigerants
B
Evaporator
Evaporator
Evaporator
Evaporator
Evaporator
Evaporator
Condensing unit
Condensing unit
Receiver
Denotes TXV
Receiver
Continued …...
Section 6 page .. 13
Suva
®
Refrigerant Piping Practices
A
Evaporator
Evaporator
Evaporator
Liquid Line Feed to Stacked Evaporator Coils
refrigerants
B
Evaporator
Note the receiver, because there is a two phase condition
in the receiver little or not sub-cooling is available.
“A” is not recommended because of the “static head”of
liquid, only the bottom coil will receive a full column of
liquid, the middle would have liquid and some vapour
and the top coil could receive little liquid and the majority
of the vapour therefore poor system performance. Vapour
bubbles will rise to the top coil.
“B” is recommended as all coils will be feed equal
quality refrigerant therefore having balanced
evaporators and good performance.
Evaporator
Evaporator
Condensing unit
Condensing unit
Receiver
Receiver
Denotes TXV
Section 6 page .. 14
Suva
®
refrigerants
Typical Condenser Piping Arrangements
Air Cooled Condenser
Liquid lines
Minimum 6 ft. vertical
drop before joining split
condenser liquid lines.
Split Condenser Circuits
Section 6 page .. 15
" Quick Pick " Criteria
Section 7
Suva
®
refrigerants
Refrigerant Piping
" Quick Pick "
Selection Criteria
The Quick Pick Manual is designed around the use of ACR tubing.This quick reference is for tonnages up
to 50 tons in capacity and having a maximum total equivalent line length not exceeding 150 feet. These
tables are based on a minimum velocity of 1500 fpm. For larger tonnages, verification of velocities,
verification of pressure drops or line sizes please use the appreciate nomograph.
Section 7 page .. 1
Suva
®
Refrigerant Piping
refrigerants
“Quick Pick” Criteria
Good piping design will result in a system having large enough discharge, liquid and suction lines to
prevent excessive pressure drop yet be small enough to maintain an adequate velocity of refrigerant
flow to return the oil to the compressor crankcase.
Refrigerant Line Velocities
1. Liquid condensate line from the condensers to
receivers should be sized for a velocity of 100
fpm or less.
2. Liquid lines from the receiver to evaporators
should be sized to maintain a velocity below
300 fpm to minimizing liquid hammer.
3. Vapour line feasible design velocities{ are:
Suction line ........ 900 to 4000 ft/min
Discharge line ... 2000 to 3500 ft/min
Defrost line ....... 1000 to 2000 ft/min
4. A double riser gives the effect of a
downsized riser at minimum load, while
providing about the same pressure drop as a
full sized line at full load. The smaller riser
is sized to ensure oil return at the minimum
capacity step; the larger riser is sized so
that the combined “flow areas” of both of
these risers is approximately equal to that of
the main suction line.
{
Velocities as recommended by ASHRAE Fundamentals handbook
5 The following Refrigerant “Quick Pick” tables are based on a minimum refrigerant
velocity of at least 1500 ft/min while not exceeding the suggested allowable pressure
drop in psig equaling 2F° in the suction lines. The discharge line and the liquid line are
based on a pressure drop maximum equaling 1F° .
Section 7 page .. 2
HFC " Quick Pick "
Section 8
Suva
®
refrigerants
Suva HFC Refrigerant
®
" Quick Pick "
Handbook
Section 8 page .. 1
Suva
®
refrigerants
HFC " Quick Pick " … Section Eight
HFC Replacement Guide …………….
page 3
R-134a Quick Pick …..………………
page 4
R-404A Quick Pick ………………....
page 10
R-407C Quick Pick …………..…..…
page 16
R-410A Quick Pick ……...……….…
page 22
R-507 Quick Pick …………………..
page 26
R-508B Quick Pick …………………
page 34
Section 8 page .. 2
Suva
®
HFC Replacement Guide
refrigerants
Direct Expansion Applications
Jan 1st
90
91
92
93
94
96
2005
HCFC phase out
Suva 134a
2020
HFC
R-12
Suva 404A
..
Suva 507
HFC
R-502
Suva 410A
New Equipment Design Only
HFC
R-22
Suva 407C
HFC
Suva 508B
PFC
R-13
R-503
Guide Notes: __________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
Section 8 page .. 3
Suva
®
refrigerants
Refrigerant
Suva 134a (R-134a)
Piping Guide
From 18,000 BTU through 600,000 BTU per hour at -30º F through
+ 50º F saturated suction temperature. (1.5 ton through 50.0 tons)
" Quick Pick "
Section 8 page .. 4
Suva
Suva 134a
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
50º F through 30º F
(48 through 26 psig)
29º F through 10º F
(25 through 12 psig)
9º F through -10º F
(11 through 2 psig)
Suggested Allowable Pressure Drop in psig = 2Fº
2.2 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
5/8
3/4
3/4
3/4
7/8
7/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
1.4 lbs. (2Fº)
1.0 lbs. (2Fº)
25
50
75
100
150
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
3 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
5 1/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Line Lengths ... feet
25
75
100
150
25
3/4
7/8
7/8
7/8
1 1/8
1 1/8
3/4
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
•
•
•
•
•
50
50
75
100
150
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 8 page .. 5
Suva
Suva 134a
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
- 11º F through - 30º F
(1 psig through 10" Hg)
- 31º F through - 50º F
(11" through 19" Hg)
Suggested Allowable Pressure Drop in psig = 2Fº
0.6 lbs. (2Fº)
0.5 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
25
50
75
100
150
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
4 1/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
5 1/8
3 5/8
4 1/8
4 1/8
5 1/8
5 1/8
5 1/8
4 1/8
4 1/8
5 1/8
5 1/8
5 1/8
5 1/8
4 1/8
5 1/8
5 1/8
5 1/8
5 1/8
6 1/8
•
•
•
•
•
System
Capacity
Tons/Hr
System
Capacity
BTU/Hr.
1.50
2.00
2.50
3.00
3.50
4.00
18,000
24,000
30,000
36,000
42,000
48,000
N/A
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
N/A
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Lengths ... feet
25
N/A
N/A
N/A
50
N/A
N/A
N/A
75
N/A
N/A
N/A
100
N/A
N/A
N/A
150
N/A
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 8 page .. 6
Suva
Suva 134a
Refrigerant Piping Guide
Discharge Line Size
Compressor to Condenser
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
5/8
5/8
5/8
3/4
3/4
3/4
5/8
5/8
3/4
3/4
7/8
7/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
3/4
7/8
1 1/8
1 1/8
1 1/8
1 3/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
refrigerants
Liquid Line Size
Receiver to TXV
Liquid Condensate Line
Condenser to Receiver
1Fº (2.2 psi) pressure drop maximum
System
Capacity
BTU/Hr.
®
Condensate drain / vent
1Fº (2.2 psi) pressure drop maximum
100
150
3/8
1/2
1/2
1/2
1/2
1/2
1/2
1/2
1/2
1/2
5/8
5/8
1/2
1/2
1/2
5/8
5/8
5/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
1/2
5/8
3/4
3/4
3/4
7/8
5/8
5/8
3/4
3/4
7/8
7/8
5/8
3/4
3/4
7/8
7/8
1 1/8
5/8
3/4
7/8
7/8
1 1/8
1 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Line Lengths ... feet
25
•
•
•
•
•
50
75
100
150
25
50
3/4
3/4
3/4
7/8
7/8
7/8
3/4
3/4
7/8
7/8
7/8
1 1/8
3/4
7/8
7/8
7/8
1 1/8
1 1/8
1/2
1/2
1/2
1/2
5/8
5/8
1/2
1/2
5/8
5/8
5/8
5/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
5/8
3/4
3/4
3/4
7/8
7/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
75
100
150
25
50
1/2
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
3/4
3/4
5/8
5/8
5/8
3/4
3/4
3/4
3/8
3/8
3/8
3/8
1/2
1/2
3/8
3/8
1/2
1/2
1/2
1/2
5/8
3/4
7/8
7/8
7/8
1 1/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 3/8
3/4
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1/2
5/8
5/8
5/8
3/4
3/4
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
2 1/8
7/8
7/8
7/8
1 1/8
1 1/8
1 1/8
75
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 8 page .. 7
SUVA 134a REFRIGERANT
PRESSURE DROP IN LINES (65ºF Evap Outlet)
Section 8 page .. 8
SUVA 134a REFRIGERANT
VELOCITY IN LINES (65ºF Evap. Outlet)
Section 8 page .. 9
Suva
®
refrigerants
Refrigerant
Suva 404A (R-404A)
Piping Guide
From 18,000 BTU through 600,000 BTU per hour at -50º F through
+50º F saturated suction temperature. (1.5 ton through 50.0 tons)
" Quick Pick "
Section 8 page .. 10
Suva
Suva 404A
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
50º F through 30º F
(104 through 70 psig)
29º F through 10º F
(68 through 43 psig)
9º F through -10º F
(42 through 24 psig)
Suggested Allowable Pressure Drop in psig = 2Fº
3.4 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
60,000
92,000
120,000
150,000
180,000
240,000
300,000
360,000
420,000
480,000
540,000
600,000
2.6 lbs. (2Fº)
1.9 lbs. (2Fº)
75
100
150
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Line Lengths ... feet
25
50
75
100
150
5/8
5/8
3/4
3/4
3/4
3/4
5/8
3/4
3/4
7/8
7/8
7/8
3/4
7/8
7/8
7/8
7/8
1 1/8
3/4
7/8
7/8
7/8
1 1/8
1 1/8
3/4
7/8
1 1/8
1 1/8
1 1/8
1 1/8
5.00
7.50
10.00
12.50
15.00
20.00
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
7/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
2 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
25.00
30.00
35.00
40.00
45.00
50.00
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
•
•
•
•
•
25
50
75
100
150
25
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
5/8
3/4
3/4
3/4
3/4
7/8
7/8
7/8
7/8 1 1/8
7/8 1 1/8
50
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 8 page .. 11
Suva
Suva 404A
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
- 11º F through - 30º F
(23 through 10 psig)
- 31º F through - 50º F
(9 through 0 psig)
Suggested Allowable Pressure Drop in psig = 2Fº
1.4 lbs. (2Fº)
1.0 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
25
50
75
100
150
25
50
75
100
150
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
1 5/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
3 1/8
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
•
•
•
•
•
System
Capacity
BTU/Hr.
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
System
Capacity
Tons/Hr
1.50
2.00
2.50
3.00
3.50
4.00
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
5 1/8
3 5/8
4 1/8
4 1/8
5 1/8
5 1/8
5 1/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Lengths ... feet
18,000
24,000
30,000
36,000
42,000
48,000
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 8 page .. 12
Suva
Suva 404A
Refrigerant Piping Guide
Discharge Line Size
Compressor to Condenser
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
1/2
5/8
5/8
5/8
5/8
3/4
5/8
5/8
5/8
3/4
3/4
3/4
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
refrigerants
Liquid Line Size
Receiver to TXV
Liquid Condensate Line
Condenser to Receiver
1Fº (3 psi) pressure drop maximum
System
Capacity
BTU/Hr.
®
Condensate drain / vent
1Fº (3 psi) pressure drop maximum
100
150
3/8
1/2
1/2
1/2
1/2
1/2
3/8
1/2
1/2
1/2
1/2
5/8
1/2
1/2
1/2
5/8
5/8
5/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
1/2
5/8
3/4
3/4
3/4
7/8
5/8
5/8
3/4
3/4
7/8
7/8
5/8
3/4
3/4
7/8
7/8
1 1/8
5/8
3/4
7/8
7/8
1 1/8
1 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Line Lengths ... feet
25
•
•
•
•
•
50
75
100
150
25
50
5/8
5/8
3/4
3/4
3/4
7/8
5/8
3/4
3/4
3/4
7/8
7/8
5/8
3/4
3/4
7/8
7/8
1 1/8
1/2
1/2
1/2
5/8
5/8
5/8
1/2
1/2
5/8
5/8
5/8
5/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 1/8
1 3/8
1 5/8
1 5/8
1 5/8
5/8
5/8
3/4
3/4
7/8
7/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
75
100
150
25
50
1/2
5/8
5/8
5/8
5/8
5/8
1/2
5/8
5/8
5/8
5/8
3/4
5/8
5/8
5/8
3/4
3/4
3/4
3/8
3/8
3/8
1/2
1/2
1/2
3/8
3/8
1/2
1/2
1/2
1/2
5/8
3/4
7/8
7/8
7/8
1 1/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 3/8
3/4
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1/2
1/2
5/8
5/8
3/4
3/4
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
7/8
7/8
7/8
1 1/8
1 1/8
1 1/8
75
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 8 page .. 13
SUVA 404A REFRIGERANT
PRESSURE DROP IN LINES (65ºF Evap. Outlet)
Section 8 page .. 14
SUVA 404A REFRIGERANT
VELOCITY IN LINES (65ºF Evap. Outlet)
Section 8 page .. 15
Suva
®
refrigerants
Refrigerant
Suva 407C
(R-407C)
Piping Guide
From 18,000 BTU through 600,000 BTU per hour at -30º F through
+50º F saturated suction temperature. (1.5 ton through 50.0 tons)
" Quick Pick "
Section 8 page .. 16
Suva
Suva 407C
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
50º F through 30º F
(77 through 48 psig)
29º F through 10º F
(47 through 27 psig)
9º F through -10º F
(26 through 12 psig)
Suggested Allowable Pressure Drop in psig = 2Fº
2.5 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
60,000
92,000
120,000
150,000
180,000
240,000
300,000
360,000
420,000
480,000
540,000
600,000
1.8 lbs. (2Fº)
1.3 lbs. (2Fº)
Equivalent Suction Line Lengths ... feet
25
50
75
100
150
5/8
3/4
3/4
3/4
3/4
7/8
3/4
3/4
7/8
7/8
7/8
1 1/8
3/4
7/8
7/8
7/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
5.00
7.50
10.00
12.50
15.00
20.00
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
25.00
30.00
35.00
40.00
45.00
50.00
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
•
•
•
•
•
25
50
75
100
150
25
3/4
3/4
3/4
7/8
7/8
7/8
7/8 1 1/8
7/8 1 1/8
1 1/8 1 1/8
7/8
7/8
7/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
3/4
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
50
System
Capacity
Tons/Hr
System
Capacity
BTU/Hr.
75
100
150
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1.50
2.00
2.50
3.00
3.50
4.00
18,000
24,000
30,000
36,000
42,000
48,000
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 1/8
2 5/8
3 1/8
3 1/8
3 1/8
3 1/8
3 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
3 1/8
3 5/8
3 5/8
3 5/8
3 5/8
4 1/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 8 page .. 17
Suva
Suva 407C
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
- 11º F through - 30º F
(11 through 1 psig)
- 31º F through - 50º
(1 psig through 11" Hg)
Suggested Allowable Pressure Drop in psig = 2Fº
0.9 lbs. (2Fº)
0.6 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
25
50
75
100
150
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 1/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
3 1/8
3 5/8
3 5/8
3 5/8
3 5/8
4 1/8
3 1/8
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
3 5/8
3 5/8
4 1/8
4 1/8
5 1/8
5 1/8
•
•
•
•
•
System
Capacity
Tons/Hr
System
Capacity
BTU/Hr.
1.50
2.00
2.50
3.00
3.50
4.00
18,000
24,000
30,000
36,000
42,000
48,000
N/A
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
N/A
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Lengths ... feet
25
N/A
N/A
N/A
50
N/A
N/A
N/A
75
N/A
N/A
N/A
100
N/A
N/A
N/A
150
N/A
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 8 page .. 18
Suva
Suva 407C
Refrigerant Piping Guide
Discharge Line Size
Compressor to Condenser
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
1/2
1/2
5/8
5/8
5/8
5/8
1/2
5/8
5/8
5/8
3/4
3/4
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
3/4
3/4
7/8
1 1/8
1 1/8
1 1/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
refrigerants
Liquid Line Size
Receiver to TXV
Liquid Condensate Line
Condenser to Receiver
1Fº (3.2 psi) pressure drop maximum
System
Capacity
BTU/Hr.
®
Condensate drain / vent
1Fº (3.4 psi) pressure drop maximum
100
150
3/8
3/8
3/8
1/2
1/2
1/2
3/8
3/8
1/2
1/2
1/2
1/2
3/8
1/2
1/2
1/2
1/2
5/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
1/2
5/8
5/8
5/8
3/4
3/4
1/2
5/8
5/8
3/4
3/4
7/8
5/8
5/8
3/4
3/4
3/4
7/8
5/8
3/4
3/4
3/4
7/8
1 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
7/8
7/8
7/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Line Lengths ... feet
25
•
•
•
•
•
50
75
100
150
25
50
5/8
5/8
5/8
3/4
3/4
3/4
5/8
5/8
3/4
3/4
3/4
7/8
5/8
3/4
3/4
3/4
7/8
7/8
1/2
1/2
1/2
1/2
1/2
1/2
1/2
1/2
1/2
1/2
5/8
5/8
3/4
7/8
1 1/8
1 1/8
1 1/8
1 3/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
5/8
5/8
5/8
3/4
3/4
7/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
2 1/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
75
100
150
25
50
3/4
3/4
3/4
5/8
5/8
5/8
1/2
1/2
5/8
5/8
5/8
5/8
1/2
5/8
5/8
5/8
5/8
3/4
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
1/2
1/2
5/8
3/4
3/4
3/4
7/8
7/8
5/8
3/4
3/4
7/8
7/8
1 1/8
3/4
3/4
7/8
7/8
7/8
1 1/8
3/4
7/8
7/8
7/8
1 1/8
1 3/8
1/2
1/2
1/2
5/8
5/8
3/4
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
3/4
3/4
7/8
7/8
7/8
7/8
75
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 8 page .. 19
SUVA 407C REFRIGERANT
PRESSURE DROP IN LINES (65ºf Evap Outlet)
Section 8 page .. 20
SUVA 407C REFRIGERANT
VELOCITY IN LINES (65ºF Evap. Outlet)
Section 8 page .. 21
Suva
®
refrigerants
Refrigerant
Suva 410A (R-410A)
Piping Guide
From 18,000 BTU through 600,000 BTU per hour at -50º F through
+ 50º F saturated suction temperature. (1.5 ton through 50.0 tons)
" Quick Pick "
Section 8 page .. 22
Suva
Suva 410A
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
50º F through 30º F
(145 through 99 psig)
29º F through 10º F
(97 through 64 psig)
9º F through -10º F
(62 through 38 psig)
Suggested Allowable Pressure Drop in psig = 2Fº
4.6 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
1/2
1/2
5/8
5/8
3/4
3/4
5/8
5/8
3/4
3/4
3/4
7/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
7/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
3.5 lbs. (2Fº)
2.5 lbs. (2Fº)
75
100
150
3/4
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
1 1/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Line Lengths ... feet
25
•
•
•
•
•
50
75
100
150
5/8
3/4
3/4
3/4
7/8
7/8
5/8
3/4
3/4
7/8
7/8
7/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
25
50
75
100
150
25
5/8
5/8
3/4
3/4
7/8
7/8
5/8
3/4
3/4
7/8
7/8
7/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
3/4
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
50
5/8
3/4
3/4
7/8
3/4
7/8
7/8 1 1/8
7/8 1 1/8
7/8 1 1/8
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 8 page .. 23
Suva
Suva 410A
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
- 11º F through - 30º F
(37 through 19 psig)
- 31º F through - 50º F
(18 through 6 psig)
Suggested Allowable Pressure Drop in psig = 2Fº
1.9 lbs. (2Fº)
1.3 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
25
50
75
100
150
25
50
75
100
150
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
3 5/8
3 1/8
3 5/8
3 5/8
3 5/8
3 5/8
4 1/8
•
•
•
•
•
System
Capacity
Tons/Hr
System
Capacity
BTU/Hr.
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
1.50
2.00
2.50
3.00
3.50
4.00
18,000
24,000
30,000
36,000
42,000
48,000
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 5/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
3 1/8
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
3 5/8
3 5/8
4 1/8
4 1/8
5 1/8
5 1/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Lengths ... feet
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 8 page .. 24
Suva
Suva 410A
Refrigerant Piping Guide
Discharge Line Size
Compressor to Condenser
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
1/2
1/2
1/2
5/8
5/8
5/8
1/2
5/8
5/8
5/8
5/8
3/4
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
3/4
3/4
7/8
7/8
1 1/8
1 1/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
refrigerants
Liquid Line Size
Receiver to TXV
Liquid Condensate Line
Condenser to Receiver
1Fº (5 psi) pressure drop maximum
System
Capacity
BTU/Hr.
®
Condensate drain / vent
1Fº (5 psi) pressure drop maximum
100
150
3/8
3/8
1/2
1/2
1/2
1/2
3/8
1/2
1/2
1/2
1/2
1/2
3/8
1/2
1/2
1/2
1/2
5/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
1/2
5/8
5/8
5/8
3/4
3/4
1/2
5/8
5/8
3/4
3/4
7/8
5/8
5/8
3/4
3/4
7/8
7/8
5/8
3/4
3/4
7/8
7/8
1 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Line Lengths ... feet
25
•
•
•
•
•
50
75
100
150
25
50
1/2
5/8
5/8
5/8
3/4
3/4
5/8
5/8
5/8
3/4
3/4
3/4
5/8
5/8
3/4
3/4
3/4
7/8
1/2
1/2
1/2
1/2
1/2
5/8
1/2
1/2
1/2
1/2
5/8
5/8
3/4
7/8
1 1/8
1 1/8
1 1/8
1 3/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
5/8
5/8
5/8
3/4
3/4
7/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
2 1/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
75
100
150
25
50
1/2
1/2
5/8
5/8
5/8
5/8
1/2
5/8
5/8
5/8
5/8
5/8
1/2
5/8
5/8
5/8
5/8
3/4
3/8
3/8
3/8
3/8
3/8
1/2
3/8
3/8
3/8
3/8
1/2
1/2
5/8
3/4
3/4
3/4
7/8
7/8
5/8
3/4
3/4
7/8
7/8
1 1/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 3/8
1/2
1/2
1/2
5/8
5/8
3/4
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
3/4
3/4
7/8
7/8
7/8
1 1/8
75
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 8 page .. 25
Suva
®
refrigerants
Refrigerant
Suva 507
(R-507)
Piping Guide
From 18,000 BTU through 600,000 BTU per hour at -50º F through
+ 50º F saturated suction temperature. (1.5 ton through 50.0 tons)
" Quick Pick "
Section 8 page .. 26
Suva
Suva 507
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
50º F through 30º F
(104 through 70 psig)
29º F through 10º F
(68 through 43 psig)
9º F through -10º F
(42 through 24 psig)
Suggested Allowable Pressure Drop in psig = 2Fº
3.4 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
60,000
92,000
120,000
150,000
180,000
240,000
300,000
360,000
420,000
480,000
540,000
600,000
2.6 lbs. (2Fº)
75
100
150
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Line Lengths ... feet
50
75
100
150
5/8
5/8
3/4
3/4
3/4
3/4
5/8
3/4
3/4
7/8
7/8
7/8
3/4
7/8
7/8
7/8
7/8
1 1/8
3/4
7/8
7/8
7/8
1 1/8
1 1/8
3/4
7/8
1 1/8
1 1/8
1 1/8
1 1/8
5.00
7.50
10.00
12.50
15.00
20.00
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
7/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
2 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
25.00
30.00
35.00
40.00
45.00
50.00
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
•
•
•
•
•
1.9 lbs. (2Fº)
25
25
50
75
100
150
25
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3/4
5/8
3/4
3/4
7/8
3/4
7/8
7/8
7/8 1 1/8
7/8 1 1/8
50
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0. Suva 404A (R-404A) for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 8 page .. 27
Suva
Suva 507
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
- 11º F through - 30º F
(23 through 10 psig)
- 31º F through - 50º F
(9 through 0 psig)
Suggested Allowable Pressure Drop in psig = 2Fº
1.4 lbs. (2Fº)
•
•
•
•
•
1.0 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
25
50
75
100
150
25
50
75
100
150
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
1 5/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
3 1/8
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
System
Capacity
Tons/Hr
System
Capacity
BTU/Hr.
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1.50
2.00
2.50
3.00
3.50
4.00
18,000
24,000
30,000
36,000
42,000
48,000
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
5 1/8
3 5/8
4 1/8
4 1/8
5 1/8
5 1/8
5 1/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Lengths ... feet
Refer to DuPont Refrigerant Expert, version 2.0. Suva 404A (R-404A) for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 8 page .. 28
Suva
Suva 507
Refrigerant Piping Guide
Discharge Line Size
Compressor to Condenser
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
1/2
5/8
5/8
5/8
5/8
3/4
5/8
5/8
5/8
3/4
3/4
3/4
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
•
•
•
•
•
refrigerants
Liquid Line Size
Receiver to TXV
Liquid Condensate Line
Condenser to Receiver
1Fº (3 psi) pressure drop maximum
System
Capacity
BTU/Hr.
®
Condensate drain / vent
1Fº (3 psi) pressure drop maximum
100
150
3/8
1/2
1/2
1/2
1/2
1/2
3/8
1/2
1/2
1/2
1/2
5/8
1/2
1/2
1/2
5/8
5/8
5/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
1/2
5/8
3/4
3/4
3/4
7/8
5/8
5/8
3/4
3/4
7/8
7/8
5/8
3/4
3/4
7/8
7/8
1 1/8
5/8
3/4
7/8
7/8
1 1/8
1 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Line Lengths ... feet
25
50
75
100
150
25
50
5/8
5/8
3/4
3/4
3/4
7/8
5/8
3/4
3/4
3/4
7/8
7/8
5/8
3/4
3/4
7/8
7/8
1 1/8
1/2
1/2
1/2
5/8
5/8
5/8
1/2
1/2
5/8
5/8
5/8
5/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 1/8
1 3/8
1 5/8
1 5/8
1 5/8
5/8
5/8
3/4
3/4
7/8
7/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
75
100
150
25
50
1/2
5/8
5/8
5/8
5/8
5/8
1/2
5/8
5/8
5/8
5/8
3/4
5/8
5/8
5/8
3/4
3/4
3/4
3/8
3/8
3/8
1/2
1/2
1/2
3/8
3/8
1/2
1/2
1/2
1/2
5/8
3/4
7/8
7/8
7/8
1 1/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 3/8
3/4
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1/2
1/2
5/8
5/8
3/4
3/4
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
7/8
7/8
7/8
1 1/8
1 1/8
1 1/8
75
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0. Suva 404A (R-404A) for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 8 page .. 29
Suva 507
Refrigerant Piping Guide
Suva
®
refrigerants
Suva 507 Pressure Drop in Lines
refer to page 14 (Suva 404A)
Suva 507 Velocity in Lines
refer to page 15 (Suva 404A)
Section 8 page .. 30
Suva
®
refrigerants
Refrigerant
Suva 95 (R-508B)
Piping Guide
From 12,000 BTU through 240,000 BTU per hour at -130º F through
-60º F saturated suction temperature. (1.0 ton through 20.0 tons)
" Quick Pick "
Note:
This data is for the selection of the second stage refrigeration piping of a typical cascade refrigeration system ONLY.
In the first stage use Suva 404A (R-404A) refrigerant and select the suggested pipe size from the Suva 404A (R-404A)
refrigerant piping guide.
Section 8 page .. 31
Suva
Suva 95
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
- 60º F through -100º F
(68 through 17 psig)
- 101º F through - 115º F
(16 through 6 psig)
- 116º F through - 130º F
(5 psig through 4" Hg)
Suggested Allowable Pressure Drop in psig = 2Fº
2.6 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
25
50
75
100
12,000
18,000
24,000
30,000
36,000
42,000
1.00
1.50
2.00
2.50
3.00
3.50
3/4
7/8
7/8
7/8
1 1/8
1 1/8
3/4
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
48,000
60,000
92,000
120,000
180,000
240,000
4.00
5.00
7.50
10.00
15.00
20.00
1 1/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 5/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 5/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
1.4 lbs. (2Fº)
1.0 lbs. (2Fº)
N/A
1.00
1.50
2.00
2.50
3.00
3.50
System
Capacity
BTU/Hr.
12,000
18,000
24,000
30,000
36,000
42,000
N/A
4.00
5.00
7.50
10.00
15.00
20.00
48,000
60,000
92,000
120,000
180,000
240,000
N/A
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Line Lengths ... feet
N/A
•
•
•
•
•
N/A
N/A
N/A
150
25
N/A
3/4
7/8
1 1/8
1 1/8
1 1/8
1 3/8
N/A
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 5/8
N/A
N/A
50
75
100
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
N/A
N/A
N/A
150
25
50
75
100
N/A
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
N/A
1 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 1/8
2 1/8
2 5/8
3 1/8
3 1/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 5/8
N/A
N/A
N/A
N/A
N/A
150
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of - 60º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of - 20º F.
Section 8 page .. 32
Suva
Suva 95
Refrigerant Piping Guide
Discharge Line Size
Compressor to Condenser
System
Capacity
Tons/Hr
12,000
18,000
24,000
30,000
36,000
42,000
1.00
1.50
2.00
2.50
3.00
3.50
48,000
60,000
92,000
120,000
180,000
240,000
4.00
5.00
7.50
10.00
15.00
20.00
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
refrigerants
Liquid Line Size
Receiver to TXV
Liquid Condensate Line
Condenser to Receiver
1Fº (3.2 psi) pressure drop maximum
System
Capacity
BTU/Hr.
®
Condensate drain / vent
1Fº (3.4 psi) pressure drop maximum
N/A
1.00
1.50
2.00
2.50
3.00
3.50
System
Capacity
BTU/Hr.
12,000
18,000
24,000
30,000
36,000
42,000
N/A
4.00
5.00
7.50
10.00
15.00
20.00
48,000
60,000
92,000
120,000
180,000
240,000
N/A
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Line Lengths ... feet
25
50
75
100
1/2
5/8
5/8
3/4
3/4
3/4
5/8
3/4
3/4
3/4
7/8
7/8
5/8
3/4
7/8
7/8
7/8
1 1/8
5/8
3/4
7/8
7/8
1 1/8
1 1/8
7/8
7/8
1 1/8
1 1/8
1 3/8
1 5/8
1 1/8
1 1/8
1 1/8
1 3/8
1 5/8
2 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
2 1/8
1 1/8
1 1/8
1 3/8
1 5/8
2 1/8
2 1/8
N/A
•
•
•
•
•
N/A
N/A
N/A
150
N/A
N/A
N/A
25
50
75
1/2
1/2
5/8
5/8
5/8
5/8
1/2
5/8
5/8
5/8
3/4
3/4
1/2
5/8
5/8
3/4
3/4
3/4
5/8
3/4
5/8
3/4
7/8
3/4
7/8
7/8
7/8 1 1/8
1 1/8 1 3/8
3/4
3/4
7/8
1 1/8
1 3/8
1 3/8
3/4
7/8
7/8
1 1/8
1 3/8
1 3/8
1/2
1/2
5/8
5/8
5/8
5/8
N/A
N/A
N/A
100
N/A
150
25
50
75
100
N/A
3/8
3/8
1/2
1/2
1/2
1/2
3/8
3/8
1/2
1/2
1/2
1/2
3/8
1/2
1/2
1/2
5/8
5/8
3/8
1/2
1/2
5/8
5/8
5/8
N/A
1/2
1/2
5/8
3/4
3/4
7/8
5/8
5/8
3/4
3/4
7/8
1 1/8
5/8
5/8
3/4
7/8
1 1/8
1 1/8
5/8
3/4
3/4
7/8
1 1/8
1 1/8
N/A
N/A
N/A
N/A
N/A
150
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of - 60º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of - 20º F.
Section 8 page .. 33
Suva
®
Guide Notes:
refrigerants
______________________________________________________________________
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Section 8 page .. 34
HCFC " Quick Pick "
Section 9
Suva
®
refrigerants
HCFC Refrigerant
" Quick Pick "
Handbook
Section 9 page .. 1
Suva
®
refrigerants
HCFC " Quick Pick " … Section Nine
R-22 Quick Pick ……………………..
page 3
R-124 Quick Pick …..………………
page
R-401A Quick Pick ………………….
page 12
R-402A Quick Pick …………..…..…
page 16
9
Section 9 page .. 2
Suva
®
refrigerants
Refrigerant
Freon 22 (R-22)
Piping Guide
From 18,000 BTU through 600,000 BTU per hour at -50º F through
+50º F saturated suction temperature. (1.5 ton through 50.0 tons)
“Quick Pick”
Section 9 page .. 3
Suva
Freon 22
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
50º F through 30º F
(84 through 55 psig)
29º F through 10º F
(54 through 33 psig)
9º F through -10º F
(32 through 16 psig)
Suggested Allowable Pressure Drop in psig = 2Fº
2.9 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
60,000
92,000
120,000
150,000
180,000
240,000
300,000
360,000
420,000
480,000
540,000
600,000
2.2 lbs. (2Fº)
1.7 lbs. (2Fº)
75
100
150
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 1/8
2 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
3 5/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Line Lengths ... feet
25
50
75
100
150
5/8
5/8
3/4
3/4
3/4
7/8
3/4
3/4
7/8
7/8
7/8
1 1/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
5.00
7.50
10.00
12.50
15.00
20.00
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
25.00
30.00
35.00
40.00
45.00
50.00
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
•
•
•
•
•
25
50
75
100
150
25
3/4
3/4
3/4
7/8
7/8
7/8
7/8 1 1/8
7/8 1 1/8
1 1/8 1 1/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
50
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 9 page .. 4
Suva
Freon 22
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
- 11º F through - 30º F
(16 through 5 psig)
- 31º F through - 50º F
(4 psig through 7" Hg)
1.1 lbs. (2Fº)
0.8 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
25
50
75
100
150
25
50
75
100
150
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
3 5/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
3 5/8
4 1/8
4 1/8
4 1/8
5 1/8
5 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
5 1/8
3 5/8
3 5/8
4 1/8
5 1/8
5 1/8
5 1/8
•
•
•
•
•
System
Capacity
BTU/Hr.
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
System
Capacity
Tons/Hr
1.50
2.00
2.50
3.00
3.50
4.00
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
2 5/8
2 5/8
3 1/8
3 5/8
3 5/8
4 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
3 5/8
4 1/8
5 1/8
5 1/8
5 1/8
5 1/8
4 1/8
5 1/8
5 1/8
5 1/8
5 1/8
6 1/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Lengths ... feet
18,000
24,000
30,000
36,000
42,000
48,000
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 9 page .. 5
Suva
Freon 22
Refrigerant Piping Guide
Discharge Line Size
Compressor to Condenser
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
1/2
5/8
5/8
3/4
3/4
3/4
5/8
5/8
3/4
3/4
3/4
3/4
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
3/4
7/8
1 1/8
1 1/8
1 1/8
1 3/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
refrigerants
Liquid Line Size
Receiver to TXV
Liquid Condensate Line
Condenser to Receiver
1Fº (3 psi) pressure drop maximum
System
Capacity
BTU/Hr.
®
Condensate drain / vent
1Fº (3 psi) pressure drop maximum
100
150
3/8
3/8
1/2
1/2
1/2
1/2
3/8
1/2
1/2
1/2
1/2
5/8
1/2
1/2
1/2
1/2
5/8
5/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
1/2
5/8
5/8
3/4
3/4
7/8
5/8
5/8
3/4
3/4
7/8
7/8
5/8
3/4
3/4
3/4
7/8
1 1/8
5/8
3/4
3/4
7/8
7/8
1 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Line Lengths ... feet
25
•
•
•
•
•
50
75
100
150
25
50
5/8
3/4
3/4
3/4
7/8
7/8
5/8
3/4
3/4
7/8
7/8
7/8
3/4
3/4
7/8
7/8
7/8
1 1/8
1/2
1/2
1/2
1/2
5/8
5/8
1/2
1/2
1/2
5/8
5/8
5/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
5/8
3/4
3/4
3/4
7/8
7/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
75
100
150
25
50
1/2
1/2
5/8
5/8
5/8
5/8
1/2
5/8
5/8
5/8
5/8
3/4
5/8
5/8
5/8
5/8
3/4
3/4
3/8
3/8
3/8
3/8
1/2
1/2
3/8
3/8
3/8
1/2
1/2
1/2
5/8
3/4
3/4
7/8
7/8
1 1/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
7/8
7/8
1 1/8
1 3/8
3/4
7/8
7/8
1 1/8
1 1/8
1 3/8
1/2
5/8
5/8
5/8
3/4
3/4
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
7/8
7/8
7/8
1 1/8
1 1/8
1 1/8
75
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 9 page .. 6
FREON "22" REFRIGERANT
PRESSURE DROP IN LINES (65ºF Evap. Outlet)
Section 9 page .. 7
FREON "22" REFRIGERANT
VELOCITY IN LINES (65ºF Evap. Outlet)
Section 9 page .. 8
Suva
®
refrigerants
Refrigerant
Suva 124 (R-124)
Piping Guide
From 18,000 BTU through 240,000 BTU per hour at -10º F through
+ 50º F saturated suction temperature. (1.5 ton through 20.0 tons)
“Quick Pick”
Section 9 page .. 9
Suva
Suva 124
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
50º F through 30º F
(19 through 8 psig)
29º F through 10º F
(8 through 0 psig)
9º F through -10º F
(1" Hg through 11" Hg)
Suggested Allowable Pressure Drop in psig = 2Fº
1.1 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
25
50
75
100
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
0.8 lbs. (2Fº)
0.5 lbs. (2Fº)
Equivalent Suction Line Lengths ... feet
N/A
•
•
•
•
•
N/A
N/A
N/A
150
25
N/A
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
N/A
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
N/A
N/A
50
75
100
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
3 1/8
3 1/8
3 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
N/A
N/A
N/A
150
25
50
75
100
N/A
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
N/A
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
2 1/8
2 5/8
3 1/8
3 1/8
3 5/8
3 5/8
2 5/8
2 5/8
3 1/8
3 5/8
3 5/8
4 1/8
2 5/8
3 1/8
3 1/8
3 5/8
3 5/8
4 1/8
N/A
N/A
N/A
N/A
N/A
System
Capacity
150 Tons/Hr
1.50
2.00
2.50
N/A
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
N/A
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
N/A
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 9 page .. 10
Suva
Suva 124
Refrigerant Piping Guide
Discharge Line Size
Compressor to Condenser
System
Capacity
Tons/Hr
25
50
75
100
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
refrigerants
Liquid Line Size
Receiver to TXV
Liquid Condensate Line
Condenser to Receiver
1Fº (1.4 psi) pressure drop maximum
System
Capacity
BTU/Hr.
®
Condensate drain / vent
1Fº (1.4 psi) pressure drop maximum
Equivalent Line Lengths ... feet
N/A
•
•
•
•
•
N/A
N/A
N/A
50
75
N/A
1/2
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
3/4
3/4
3/4
5/8
5/8
3/4
3/4
3/4
3/4
5/8
5/8
3/4
3/4
3/4
7/8
N/A
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
1 1/8
1 1/8
1 3/8
1 3/8
7/8
7/8
1 1/8
1 3/8
1 3/8
1 3/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
150
N/A
25
N/A
N/A
N/A
100
N/A
150
25
50
75
100
N/A
3/8
1/2
1/2
1/2
1/2
1/2
1/2
1/2
1/2
5/8
5/8
5/8
1/2
1/2
5/8
5/8
5/8
5/8
1/2
1/2
5/8
5/8
5/8
3/4
N/A
5/8
5/8
3/4
3/4
7/8
7/8
5/8
3/4
7/8
7/8
1 1/8
1 1/8
3/4
3/4
7/8
1 1/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 3/8
N/A
N/A
N/A
N/A
N/A
System
Capacity
150 Tons/Hr
1.50
2.00
2.50
N/A
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
N/A
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
N/A
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 9 page .. 11
Suva
®
refrigerants
Refrigerant
Suva 401A (R-401A)
Piping Guide
From 18,000 BTU through 600,000 BTU per hour at -30º F through
+ 50º F saturated suction temperature. (1.5 ton through 50.0 tons)
“Quick Pick”
Section 9 page .. 12
Suva
Suva 401A
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
50º F through 30º F
(46 through 27 psig)
29º F through 10º F
(26 through 13 psig)
9º F through -10º F
(11 through 2 psig)
Suggested Allowable Pressure Drop in psig = 2Fº
2.0 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
25
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
3/4
3/4
7/8
7/8
7/8
1 1/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
1.4 lbs. (2Fº)
1.0 lbs. (2Fº)
25
50
75
100
150
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
3 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
3 5/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
3 5/8
4 1/8
4 1/8
4 1/8
5 1/8
5 1/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Line Lengths ... feet
75
100
150
25
3/4
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 1/8
•
•
•
•
•
50
50
75
100
150
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 9 page .. 13
Suva
Suva 401A
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
- 11º F through - 30º F
(2 psig through 9" Hg)
- 31º F through - 50º F
(10" through 18" Hg)
Suggested Allowable Pressure Drop in psig = 2Fº
0.7 lbs. (2Fº)
0.4 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
25
50
75
100
150
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
3 5/8
2 5/8
2 5/8
3 1/8
3 5/8
3 5/8
4 1/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
3 5/8
3 5/8
4 1/8
4 1/8
5 1/8
5 1/8
4 1/8
4 1/8
5 1/8
5 1/8
5 1/8
5 1/8
4 1/8
4 1/8
5 1/8
5 1/8
5 1/8
5 1/8
4 1/8
5 1/8
5 1/8
5 1/8
5 1/8
6 1/8
•
•
•
•
•
System
Capacity
Tons/Hr
System
Capacity
BTU/Hr.
1.50
2.00
2.50
3.00
3.50
4.00
18,000
24,000
30,000
36,000
42,000
48,000
N/A
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
N/A
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Lengths ... feet
25
N/A
N/A
N/A
50
N/A
N/A
N/A
75
N/A
N/A
N/A
100
N/A
N/A
N/A
150
N/A
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 9 page .. 14
Suva
Suva 401A
Refrigerant Piping Guide
Discharge Line Size
Compressor to Condenser
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
60,000
92,000
120,000
150,000
180,000
240,000
300,000
360,000
420,000
480,000
540,000
600,000
refrigerants
Liquid Line Size
Receiver to TXV
Liquid Condensate Line
Condenser to Receiver
1Fº (2.2 psi) pressure drop maximum
System
Capacity
BTU/Hr.
®
Condensate drain / vent
1Fº (2.4 psi) pressure drop maximum
100
150
3/8
1/2
1/2
1/2
1/2
1/2
3/8
1/2
1/2
1/2
1/2
5/8
1/2
1/2
1/2
5/8
5/8
5/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
1/2
5/8
3/4
3/4
3/4
7/8
5/8
5/8
3/4
3/4
7/8
7/8
5/8
3/4
3/4
7/8
7/8
1 1/8
5/8
3/4
7/8
7/8
1 1/8
1 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Line Lengths ... feet
25
50
75
100
150
25
50
5/8
5/8
5/8
3/4
3/4
3/4
5/8
3/4
3/4
3/4
7/8
7/8
3/4
3/4
3/4
7/8
7/8
1 1/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
1/2
1/2
1/2
1/2
5/8
5/8
1/2
1/2
5/8
5/8
5/8
5/8
5.00
7.50
10.00
12.50
15.00
20.00
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 1/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
5/8
3/4
3/4
3/4
7/8
7/8
25.00
30.00
35.00
40.00
45.00
50.00
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
•
•
•
•
•
75
100
150
25
50
1/2
5/8
5/8
5/8
5/8
5/8
1/2
5/8
5/8
5/8
5/8
3/4
5/8
5/8
5/8
3/4
3/4
3/4
3/8
3/8
3/8
3/8
1/2
1/2
3/8
3/8
1/2
1/2
1/2
1/2
5/8
3/4
7/8
7/8
7/8
1 1/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 3/8
3/4
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1/2
5/8
5/8
5/8
3/4
3/4
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
2 1/8
7/8
7/8
7/8
1 1/8
1 1/8
1 1/8
75
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 9 page .. 15
Suva
®
refrigerants
Refrigerant
Suva 402A (R-402A)
Piping Guide
From 18,000 BTU through 600,000 BTU per hour at -50º F through
+ 50º F saturated suction temperature. (1.5 ton through 50.0 tons)
“Quick Pick”
Section 9 page .. 16
Suva
Suva 402A
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
50º F through 30º F
(110 through 74 psig)
29º F through 10º F
(73 through 47 psig)
9º F through -10º F
(45 through 26 psig)
Suggested Allowable Pressure Drop in psig = 2Fº
3.6 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
60,000
92,000
120,000
150,000
180,000
240,000
300,000
360,000
420,000
480,000
540,000
600,000
2.7 lbs. (2Fº)
2.0 lbs. (2Fº)
75
100
150
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 1/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Line Lengths ... feet
25
50
75
100
150
25
5/8
5/8
3/4
3/4
7/8
7/8
3/4
3/4
7/8
7/8
7/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
3/4
3/4
7/8
7/8
7/8
1 1/8
5.00
7.50
10.00
12.50
15.00
20.00
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
25.00
30.00
35.00
40.00
45.00
50.00
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
•
•
•
•
•
50
75
100
150
25
3/4
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
3/4
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
50
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 9 page .. 17
Suva
Suva 402A
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
- 11º F through - 30º F
(25 through 11 psig)
- 31º F through - 50º F
(11 through 1 psig)
Suggested Allowable Pressure Drop in psig = 2Fº
1.5 lbs. (2Fº)
1.1 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
25
50
75
100
150
25
50
75
100
150
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 5/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
5 1/8
3 5/8
4 1/8
4 1/8
5 1/8
5 1/8
5 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
3 5/8
3 5/8
4 1/8
4 1/8
5 1/8
5 1/8
3 5/8
4 1/8
4 1/8
5 1/8
5 1/8
5 1/8
•
•
•
•
•
System
Capacity
BTU/Hr.
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
System
Capacity
Tons/Hr
1.50
2.00
2.50
3.00
3.50
4.00
2 1/8
2 5/8
3 1/8
3 1/8
3 5/8
3 5/8
2 5/8
3 1/8
3 1/8
3 5/8
3 5/8
4 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
4 1/8
4 1/8
5 1/8
5 1/8
5 1/8
5 1/8
5 1/8
5 1/8
5 1/8
5 1/8
6 1/8
6 1/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Lengths ... feet
18,000
24,000
30,000
36,000
42,000
48,000
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 9 page .. 18
Suva
Suva 402A
Refrigerant Piping Guide
Discharge Line Size
Compressor to Condenser
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
1/2
5/8
5/8
5/8
3/4
3/4
5/8
5/8
3/4
3/4
3/4
7/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
3/4
7/8
1 1/8
1 1/8
1 1/8
1 3/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
refrigerants
Liquid Line Size
Receiver to TXV
Liquid Condensate Line
Condenser to Receiver
1Fº (3.7 psi) pressure drop maximum
System
Capacity
BTU/Hr.
®
Condensate drain / vent
1Fº (3.7 psi) pressure drop maximum
100
150
3/8
1/2
1/2
1/2
5/8
5/8
1/2
1/2
1/2
5/8
5/8
5/8
1/2
1/2
5/8
5/8
5/8
5/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
5/8
5/8
3/4
3/4
7/8
7/8
5/8
3/4
3/4
7/8
7/8
1 1/8
5/8
3/4
7/8
7/8
1 1/8
1 1/8
3/4
3/4
7/8
1 1/8
1 1/8
1 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Line Lengths ... feet
25
•
•
•
•
•
50
75
100
150
25
50
5/8
3/4
3/4
3/4
7/8
7/8
5/8
3/4
3/4
7/8
7/8
7/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
1/2
1/2
1/2
5/8
5/8
5/8
1/2
5/8
5/8
5/8
5/8
5/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
5/8
3/4
3/4
7/8
7/8
7/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
75
100
150
25
50
1/2
5/8
5/8
5/8
3/4
3/4
5/8
5/8
5/8
3/4
3/4
3/4
5/8
5/8
3/4
3/4
3/4
3/4
3/8
3/8
3/8
1/2
1/2
1/2
3/8
1/2
1/2
1/2
1/2
1/2
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 3/8
3/4
7/8
1 1/8
1 1/8
1 3/8
1 3/8
7/8
7/8
1 1/8
1 3/8
1 3/8
1 3/8
1/2
5/8
5/8
3/4
3/4
3/4
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
75
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 9 page .. 19
CFC " Quick Pick "
Section 10
Suva
®
refrigerants
CFC Refrigerant
" Quick Pick "
Handbook
Section 10 page .. 1
Suva
®
refrigerants
CFC " Quick Pick " … Section Nine
R-12 Quick Pick ……………………..
page 3
R-13 Quick Pick …..…………….……
page 9
R-114 Quick Pick ………………...….
page 12
R-500 Quick Pick …………..…..…….
page 15
R-502 Quick Pick ……………...……..
page 19
R-503 Quick Pick …………………….
Page 25
Section 10 page .. 2
Suva
®
refrigerants
Refrigerant
Freon 12 (R-12)
Piping Guide
From 18,000 BTU through 600,000 BTU per hour at -30º F through
+ 50º F saturated suction temperature. (1.5 ton through 50.0 tons)
“Quick Pick”
Section 10 page .. 3
Suva
Freon 12
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
50º F through 30º F
(47 through 29 psig)
29º F through 10º F
(28 through 15 psig)
9º F through -10º F
(14 through 4.5 psig)
Suggested Allowable Pressure Drop in psig = 2Fº
1.9 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
25
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
3/4
7/8
7/8
7/8
1 1/8
1 1/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
1.3 lbs. (2Fº)
1.0 lbs. (2Fº)
25
50
75
100
150
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
5 1/8
3 5/8
4 1/8
4 1/8
5 1/8
5 1/8
5 1/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Line Lengths ... feet
75
100
150
25
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
•
•
•
•
•
50
50
75
100
150
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 10 page .. 4
Suva
Freon 12
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
- 11º F through - 30º F
(4 psig through 6" Hg)
- 31º F through - 50º F
(6" through 16" Hg)
Suggested Allowable Pressure Drop in psig = 2Fº
0.7 lbs. (2Fº)
0.5 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
25
50
75
100
150
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
2 1/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
3 5/8
2 5/8
3 1/8
3 1/8
3 5/8
3 5/8
4 1/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
3 1/8
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
3 5/8
4 1/8
4 1/8
5 1/8
5 1/8
5 1/8
4 1/8
4 1/8
5 1/8
5 1/8
5 1/8
5 1/8
4 1/8
5 1/8
5 1/8
5 1/8
5 1/8
5 1/8
5 1/8
5 1/8
5 1/8
5 1/8
5 1/8
6 1/8
•
•
•
•
•
System
Capacity
Tons/Hr
System
Capacity
BTU/Hr.
1.50
2.00
2.50
3.00
3.50
4.00
18,000
24,000
30,000
36,000
42,000
48,000
N/A
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
N/A
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Lengths ... feet
25
N/A
N/A
N/A
50
N/A
N/A
N/A
75
N/A
N/A
N/A
100
N/A
N/A
N/A
150
N/A
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 10 page .. 5
Suva
Freon 12
Refrigerant Piping Guide
Discharge Line Size
Compressor to Condenser
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
60,000
92,000
120,000
150,000
180,000
240,000
300,000
360,000
420,000
480,000
540,000
600,000
refrigerants
Liquid Line Size
Receiver to TXV
Liquid Condensate Line
Condenser to Receiver
1Fº (1.9 psi) pressure drop maximum
System
Capacity
BTU/Hr.
®
Condensate drain / vent
1Fº (1.9 psi) pressure drop maximum
100
150
1/2
1/2
1/2
5/8
5/8
5/8
1/2
1/2
5/8
5/8
5/8
5/8
1/2
5/8
5/8
5/8
5/8
3/4
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
5/8
3/4
3/4
7/8
7/8
1 1/8
5/8
3/4
7/8
7/8
1 1/8
1 1/8
3/4
3/4
7/8
1 1/8
1 1/8
1 1/8
3/4
7/8
1 1/8
1 1/8
1 1/8
1 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Line Lengths ... feet
25
50
75
100
150
25
50
5/8
3/4
3/4
3/4
7/8
7/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
3/4
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1/2
1/2
5/8
5/8
5/8
5/8
1/2
5/8
5/8
5/8
5/8
3/4
5.00
7.50
10.00
12.50
15.00
20.00
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 1/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
3/4
3/4
7/8
7/8
7/8
1 1/8
25.00
30.00
35.00
40.00
45.00
50.00
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
•
•
•
•
•
75
100
150
25
50
5/8
5/8
5/8
3/4
3/4
3/4
5/8
5/8
3/4
3/4
3/4
3/4
5/8
3/4
3/4
3/4
3/4
7/8
3/8
3/8
1/2
1/2
1/2
1/2
3/8
1/2
1/2
1/2
1/2
5/8
3/4
7/8
7/8
1 1/8
1 1/8
1 3/8
3/4
7/8
1 1/8
1 1/8
1 3/8
1 3/8
7/8
7/8
1 1/8
1 3/8
1 3/8
1 3/8
7/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
5/8
5/8
3/4
3/4
3/4
7/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
75
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 10 page .. 6
FREON "12" REFRIGERANT
PRESSURE DROP IN LINES (65ºF Evap. Outlet)
Section 10 page .. 7
FREON "12" REFRIGERANT
VELOCITY IN LINES (65ºF Evap. Outlet)
Section 10 page .. 8
Suva
®
refrigerants
Refrigerant
Freon 13 (R-13)
Piping Guide
From 12,000 BTU through 240,000 BTU per hour at -115º F through
-30º F saturated suction temperature. (1.0 ton through 20.0 tons)
“Quick Pick”
Note:
This data is for the selection of the second stage refrigeration piping of a typical cascade refrigeration system ONLY.
In the first stage use Suva 404A (R-404A) refrigerant and select the suggested pipe size from the Suva 404A (R-404A)
refrigerant piping guide.
Section 10 page .. 9
Suva
®
Freon 13
Refrigerant Piping Guide
refrigerants
Suction Line Size .. Evaporator to Compressor
- 30º F through -59º F
(92 through 45 psig)
- 60º F through - 100º F
(44 through 7 psig)
- 101º F through - 115º F
(7 psig through 1" Hg)
Suggested Allowable Pressure Drop in psig = 2Fº
3.2 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
12,000
18,000
24,000
30,000
36,000
42,000
1.00
1.50
2.00
2.50
3.00
3.50
48,000
60,000
92,000
120,000
180,000
240,000
4.00
5.00
7.50
10.00
15.00
20.00
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
1.9 lbs. (2Fº)
1.1 lbs. (2Fº)
N/A
1.00
1.50
2.00
2.50
3.00
3.50
System
Capacity
BTU/Hr.
12,000
18,000
24,000
30,000
36,000
42,000
N/A
4.00
5.00
7.50
10.00
15.00
20.00
48,000
60,000
92,000
120,000
180,000
240,000
N/A
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Line Lengths ... feet
25
50
75
100
5/8
3/4
3/4
7/8
7/8
7/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
3/4
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 5/8
1 5/8
1 1/8
1 1/8
1 3/8
1 5/8
2 1/8
2 1/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
N/A
•
•
•
•
•
N/A
N/A
N/A
150
25
N/A
3/4
7/8
1 1/8
1 1/8
1 1/8
1 3/8
N/A
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 5/8
N/A
N/A
50
75
100
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
N/A
N/A
N/A
150
25
50
75
100
N/A
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
N/A
1 5/8
1 5/8
2 1/8
2 1/8
2 5/8
3 1/8
2 1/8
2 1/8
2 1/8
2 5/8
3 1/8
3 1/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 5/8
2 1/8
2 1/8
2 5/8
3 1/8
3 5/8
3 5/8
N/A
N/A
N/A
N/A
N/A
150
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of - 20º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of + 20º F.
Section 10 page .. 10
Suva
®
Freon 13
Refrigerant Piping Guide
Discharge Line Size
Compressor to Condenser
System
Capacity
Tons/Hr
12,000
18,000
24,000
30,000
36,000
42,000
1.00
1.50
2.00
2.50
3.00
3.50
1/2
1/2
5/8
5/8
5/8
3/4
1/2
5/8
5/8
3/4
3/4
3/4
5/8
5/8
3/4
3/4
3/4
7/8
5/8
5/8
3/4
3/4
7/8
7/8
48,000
60,000
92,000
120,000
180,000
240,000
4.00
5.00
7.50
10.00
15.00
20.00
3/4
3/4
7/8
1 1/8
1 1/8
1 3/8
7/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
7/8
1 1/8
1 1/8
1 3/8
1 5/8
1 5/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
Liquid Line Size
Receiver to TXV
Liquid Condensate Line
Condenser to Receiver
1Fº (6.5 psi) pressure drop maximum
System
Capacity
BTU/Hr.
refrigerants
Condensate drain / vent
1Fº (4.6 psi) pressure drop maximum
N/A
1.00
1.50
2.00
2.50
3.00
3.50
System
Capacity
BTU/Hr.
12,000
18,000
24,000
30,000
36,000
42,000
N/A
4.00
5.00
7.50
10.00
15.00
20.00
48,000
60,000
92,000
120,000
180,000
240,000
N/A
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Line Lengths ... feet
25
N/A
•
•
•
•
•
50
N/A
75
N/A
100
N/A
150
N/A
N/A
N/A
25
50
75
1/2
5/8
5/8
5/8
5/8
3/4
1/2
5/8
5/8
5/8
3/4
3/4
1/2
5/8
5/8
3/4
3/4
3/4
5/8
3/4
5/8
3/4
7/8
3/4
7/8
7/8
7/8 1 1/8
1 1/8 1 3/8
3/4
3/4
7/8
1 1/8
1 3/8
1 3/8
3/4
7/8
7/8
1 1/8
1 3/8
1 3/8
1/2
1/2
1/2
5/8
5/8
5/8
N/A
N/A
N/A
100
N/A
150
25
50
75
100
N/A
3/8
3/8
3/8
1/2
1/2
1/2
3/8
1/2
1/2
1/2
1/2
5/8
3/8
1/2
1/2
1/2
5/8
5/8
3/8
1/2
1/2
5/8
5/8
5/8
N/A
1/2
1/2
5/8
3/4
3/4
7/8
5/8
5/8
3/4
3/4
7/8
1 1/8
5/8
5/8
3/4
7/8
1 1/8
1 1/8
5/8
3/4
3/4
7/8
1 1/8
1 1/8
N/A
N/A
N/A
N/A
N/A
150
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of - 20º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of + 20º F.
Section 10 page .. 11
Suva
®
refrigerants
Refrigerant
Freon 114 (R-114)
Piping Guide
From 12,000 BTU through 240,000 BTU per hour at -10º F through
+ 50º F saturated suction temperature. (1.0 ton through 20.0 tons)
“Quick Pick”
Section 10 page .. 12
Suva
®
Freon 114
Refrigerant Piping Guide
refrigerants
Suction Line Size .. Evaporator to Compressor
50º F through 30º F
(4 psig through 6" Hg)
29º F through 10º F
(6" through 14" Hg)
9º F through -10º F
(15" through 20" Hg)
Suggested Allowable Pressure Drop in psig = 2Fº
0.7 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
25
50
75
100
12,000
18,000
24,000
30,000
36,000
42,000
1.00
1.50
2.00
2.50
3.00
3.50
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
48,000
60,000
92,000
120,000
180,000
240,000
4.00
5.00
7.50
10.00
15.00
20.00
1 5/8
1 5/8
2 1/8
2 5/8
2 5/8
3 1/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 5/8
2 1/8
2 1/8
2 5/8
3 1/8
3 5/8
3 5/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
0.4 lbs. (2Fº)
0.3 lbs. (2Fº)
N/A
1.00
1.50
2.00
2.50
3.00
3.50
System
Capacity
BTU/Hr.
12,000
18,000
24,000
30,000
36,000
42,000
N/A
4.00
5.00
7.50
10.00
15.00
20.00
48,000
60,000
92,000
120,000
180,000
240,000
N/A
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Line Lengths ... feet
N/A
•
•
•
•
•
N/A
N/A
N/A
150
25
N/A
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
N/A
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 5/8
N/A
N/A
50
75
100
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
4 1/8
2 5/8
2 5/8
3 1/8
3 5/8
4 1/8
5 1/8
2 5/8
2 5/8
3 1/8
3 5/8
4 1/8
5 1/8
N/A
N/A
N/A
150
25
50
75
100
N/A
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
N/A
2 5/8
2 5/8
3 1/8
3 5/8
3 5/8
4 1/8
2 5/8
3 1/8
3 5/8
3 5/8
4 1/8
5 1/8
3 1/8
3 1/8
3 5/8
4 1/8
5 1/8
5 1/8
3 1/8
3 1/8
3 5/8
4 1/8
5 1/8
6 1/8
N/A
N/A
N/A
N/A
N/A
150
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 10 page .. 13
Suva
®
Freon 114
Refrigerant Piping Guide
Discharge Line Size
Compressor to Condenser
System
Capacity
Tons/Hr
25
50
75
100
12,000
18,000
24,000
30,000
36,000
42,000
1.00
1.50
2.00
2.50
3.00
3.50
3/4
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
48,000
60,000
92,000
120,000
180,000
240,000
4.00
5.00
7.50
10.00
15.00
20.00
7/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 5/8
3 1/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
Liquid Line Size
Receiver to TXV
Liquid Condensate Line
Condenser to Receiver
1Fº (0.8 psi) pressure drop maximum
System
Capacity
BTU/Hr.
refrigerants
Condensate drain / vent
1Fº (0.8 psi) pressure drop maximum
N/A
1.00
1.50
2.00
2.50
3.00
3.50
System
Capacity
BTU/Hr.
12,000
18,000
24,000
30,000
36,000
42,000
N/A
4.00
5.00
7.50
10.00
15.00
20.00
48,000
60,000
92,000
120,000
180,000
240,000
N/A
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Line Lengths ... feet
N/A
•
•
•
•
•
N/A
N/A
N/A
50
75
N/A
1/2
5/8
5/8
5/8
3/4
3/4
5/8
5/8
3/4
3/4
3/4
7/8
5/8
5/8
3/4
3/4
7/8
7/8
5/8
3/4
3/4
7/8
7/8
7/8
N/A
3/4
3/4
7/8
1 1/8
1 3/8
1 3/8
7/8
7/8
1 1/8
1 3/8
1 3/8
1 5/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
7/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
150
N/A
25
N/A
N/A
N/A
100
N/A
150
25
50
75
100
N/A
3/8
1/2
1/2
1/2
5/8
5/8
1/2
1/2
5/8
5/8
5/8
3/4
1/2
1/2
5/8
5/8
3/4
3/4
1/2
5/8
5/8
3/4
3/4
3/4
N/A
5/8
5/8
3/4
7/8
1 1/8
1 1/8
3/4
3/4
7/8
1 1/8
1 1/8
1 3/8
3/4
7/8
7/8
1 1/8
1 1/8
1 3/8
3/4
7/8
1 1/8
1 1/8
1 3/8
1 3/8
N/A
N/A
N/A
N/A
N/A
150
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 10 page .. 14
Suva
®
refrigerants
Refrigerant
Freon 500 (R-500)
Piping Guide
From 18,000 BTU through 600,000 BTU per hour at -30º F through
+ 50º F saturated suction temperature. (1.5 ton through 50.0 tons)
“Quick Pick”
Section 10 page .. 15
Suva
Freon 500
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
50º F through 30º F
(58 through 36 psig)
29º F through 10º F
(35 through 20 psig)
9º F through -10º F
(19 through 8 psig)
Suggested Allowable Pressure Drop in psig = 2Fº
2.2 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
5/8
3/4
7/8
7/8
7/8
7/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
1.6 lbs. (2Fº)
1.2 lbs. (2Fº)
25
50
75
100
150
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
2 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 1/8
2 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
5 1/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Line Lengths ... feet
25
75
100
150
25
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
•
•
•
•
•
50
50
75
100
150
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 10 page .. 16
Suva
Freon 500
Refrigerant Piping Guide
®
refrigerants
Suction Line Size .. Evaporator to Compressor
- 11º F through - 30º F
(7 psig through 2" Hg)
- 31º F through - 50º F
(2 " through 13" Hg)
Suggested Allowable Pressure Drop in psig = 2Fº
0.8 lbs. (2Fº)
0.6 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
25
50
75
100
150
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
3 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
3 5/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
3 5/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
5 1/8
3 5/8
3 5/8
4 1/8
4 1/8
5 1/8
5 1/8
3 5/8
4 1/8
4 1/8
5 1/8
5 1/8
5 1/8
4 1/8
5 1/8
5 1/8
5 1/8
5 1/8
5 1/8
•
•
•
•
•
System
Capacity
Tons/Hr
System
Capacity
BTU/Hr.
1.50
2.00
2.50
3.00
3.50
4.00
18,000
24,000
30,000
36,000
42,000
48,000
N/A
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
N/A
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Lengths ... feet
25
N/A
N/A
N/A
50
N/A
N/A
N/A
75
N/A
N/A
N/A
100
N/A
N/A
N/A
150
N/A
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 10 page .. 17
Suva
Freon 500
Refrigerant Piping Guide
Discharge Line Size
Compressor to Condenser
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
60,000
92,000
120,000
150,000
180,000
240,000
300,000
360,000
420,000
480,000
540,000
600,000
refrigerants
Liquid Line Size
Receiver to TXV
Liquid Condensate Line
Condenser to Receiver
1Fº (2.3 psi) pressure drop maximum
System
Capacity
BTU/Hr.
®
Condensate drain / vent
1Fº (2.3 psi) pressure drop maximum
100
150
3/8
1/2
1/2
1/2
5/8
5/8
1/2
1/2
1/2
5/8
5/8
5/8
1/2
1/2
5/8
5/8
5/8
5/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
5/8
5/8
3/4
3/4
7/8
7/8
5/8
3/4
3/4
7/8
7/8
1 1/8
5/8
3/4
7/8
7/8
1 1/8
1 1/8
3/4
3/4
7/8
1 1/8
1 1/8
1 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Line Lengths ... feet
25
50
75
100
150
25
50
5/8
5/8
3/4
3/4
3/4
3/4
5/8
3/4
3/4
7/8
7/8
7/8
3/4
3/4
7/8
7/8
7/8
1 1/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
7/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1/2
1/2
1/2
5/8
5/8
5/8
1/2
5/8
5/8
5/8
5/8
5/8
5.00
7.50
10.00
12.50
15.00
20.00
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
2 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
5/8
3/4
3/4
7/8
7/8
7/8
25.00
30.00
35.00
40.00
45.00
50.00
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
•
•
•
•
•
75
100
150
25
50
1/2
5/8
5/8
5/8
3/4
3/4
5/8
5/8
5/8
3/4
3/4
3/4
5/8
5/8
3/4
3/4
3/4
3/4
3/8
3/8
3/8
1/2
1/2
1/2
3/8
1/2
1/2
1/2
1/2
1/2
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 3/8
3/4
7/8
1 1/8
1 1/8
1 3/8
1 3/8
7/8
7/8
1 1/8
1 3/8
1 3/8
1 3/8
1/2
5/8
5/8
3/4
3/4
3/4
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
75
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 10 page .. 18
Suva
®
refrigerants
Refrigerant
Freon 502 (R-502)
Piping Guide
From 18,000 BTU through 600,000 BTU per hour at -50º F through
+ 50º F saturated suction temperature. (1.5 ton through 50.0 tons)
“Quick Pick”
Section 10 page .. 19
Suva
®
Freon 502
Refrigerant Piping Guide
refrigerants
Suction Line Size .. Evaporator to Compressor
50º F through 30º F
(98 through 66 psig)
29º F through 10º F
(64 through 41 psig)
9º F through -10º F
(41 through 22 psig)
Suggested Allowable Pressure Drop in psig = 2Fº
3.2 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
60,000
92,000
120,000
150,000
180,000
240,000
300,000
360,000
420,000
480,000
540,000
600,000
2.4 lbs. (2Fº)
2.0 lbs. (2Fº)
75
100
150
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
3 5/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Line Lengths ... feet
25
50
75
100
150
25
5/8
3/4
3/4
3/4
7/8
7/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
5.00
7.50
10.00
12.50
15.00
20.00
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 1/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
25.00
30.00
35.00
40.00
45.00
50.00
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
3 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
•
•
•
•
•
50
75
100
150
25
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
7/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
2 5/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
2 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
50
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 10 page .. 20
Suva
®
Freon 502
Refrigerant Piping Guide
refrigerants
Suction Line Size .. Evaporator to Compressor
- 11º F through - 30º F
(22 through 9 psig)
- 31º F through - 50º F
(9 through 0 psig)
Suggested Allowable Pressure Drop in psig = 2Fº
1.4 lbs. (2Fº)
0.9 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
25
50
75
100
150
25
50
75
100
150
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
3 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
2 1/8
2 5/8
3 1/8
3 1/8
3 5/8
3 5/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
2 5/8
3 1/8
3 1/8
3 1/8
3 5/8
3 5/8
3 1/8
3 1/8
3 5/8
3 5/8
3 5/8
4 1/8
3 5/8
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
5 1/8
3 5/8
4 1/8
4 1/8
5 1/8
5 1/8
5 1/8
3 1/8
3 5/8
3 5/8
4 1/8
4 1/8
4 1/8
3 5/8
4 1/8
4 1/8
5 1/8
5 1/8
5 1/8
4 1/8
4 1/8
5 1/8
5 1/8
5 1/8
5 1/8
•
•
•
•
•
System
Capacity
BTU/Hr.
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
System
Capacity
Tons/Hr
1.50
2.00
2.50
3.00
3.50
4.00
2 5/8
2 5/8
3 1/8
3 1/8
3 5/8
4 1/8
2 5/8
3 1/8
3 1/8
3 5/8
3 5/8
4 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
4 1/8
5 1/8
5 1/8
5 1/8
5 1/8
6 1/8
5 1/8
5 1/8
5 1/8
6 1/8
6 1/8
6 1/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Lengths ... feet
18,000
24,000
30,000
36,000
42,000
48,000
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 10 page .. 21
Suva
®
Freon 502
Refrigerant Piping Guide
Discharge Line Size
Compressor to Condenser
System
Capacity
Tons/Hr
18,000
24,000
30,000
36,000
42,000
48,000
1.50
2.00
2.50
3.00
3.50
4.00
1/2
5/8
5/8
3/4
3/4
3/4
5/8
3/4
3/4
3/4
7/8
7/8
60,000
92,000
120,000
150,000
180,000
240,000
5.00
7.50
10.00
12.50
15.00
20.00
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
1 3/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
Liquid Line Size
Receiver to TXV
Liquid Condensate Line
Condenser to Receiver
1Fº (3.2 psi) pressure drop maximum
System
Capacity
BTU/Hr.
refrigerants
Condensate drain / vent
1Fº (3.2 psi) pressure drop maximum
100
150
1/2
1/2
1/2
1/2
5/8
5/8
1/2
1/2
1/2
5/8
5/8
5/8
1/2
1/2
5/8
5/8
5/8
3/4
1.50
2.00
2.50
3.00
3.50
4.00
System
Capacity
BTU/Hr.
18,000
24,000
30,000
36,000
42,000
48,000
5/8
3/4
3/4
7/8
7/8
1 1/8
5/8
3/4
7/8
7/8
7/8
1 1/8
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
5.00
7.50
10.00
12.50
15.00
20.00
60,000
92,000
120,000
150,000
180,000
240,000
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 5/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Line Lengths ... feet
25
•
•
•
•
•
50
75
100
150
25
50
3/4
3/4
3/4
7/8
7/8
7/8
3/4
3/4
7/8
7/8
7/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
1/2
1/2
5/8
5/8
5/8
5/8
1/2
5/8
5/8
5/8
5/8
3/4
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
2 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
5/8
3/4
3/4
7/8
7/8
1 1/8
1 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 1/8
2 1/8
2 1/8
2 1/8
2 5/8
2 5/8
2 1/8
2 1/8
2 5/8
2 5/8
2 5/8
2 5/8
1 1/8
1 3/8
1 3/8
1 3/8
1 3/8
1 3/8
75
100
150
25
50
5/8
5/8
5/8
5/8
3/4
3/4
5/8
5/8
5/8
3/4
3/4
3/4
5/8
5/8
3/4
3/4
3/4
7/8
3/8
3/8
1/2
1/2
1/2
1/2
3/8
1/2
1/2
1/2
1/2
5/8
3/4
7/8
7/8
1 1/8
1 1/8
1 3/8
3/4
7/8
1 1/8
1 1/8
1 1/8
1 3/8
7/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1/2
5/8
5/8
3/4
3/4
7/8
1 3/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
1 3/8
1 5/8
1 5/8
1 5/8
1 5/8
2 1/8
1 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
75
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of 65º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of 105º F.
Section 10 page .. 22
FREON "502" REFRIGERANT
PRESSURE DROP IN LINES (65ºF Evap. Outlet)
Section 10 page .. 23
FREON "502" REFRIGERANT
VELOCITY IN LINES (65ºF Evap. Outlet)
Section 10 page .. 24
Suva
®
refrigerants
Refrigerant
Freon 503 (R-503)
Piping Guide
From 12,000 BTU through 240,000 BTU per hour at -130º F through
-60º F saturated suction temperature. (1.0 ton through 20.0 tons)
“Quick Pick”
Note:
This data is for the selection of the second stage refrigeration piping of a typical cascade refrigeration system ONLY.
In the first stage use Suva 404A (R-404A) refrigerant and select the suggested pipe size from the Suva 404A (R-404A)
refrigerant piping guide.
Section 10 page .. 25
Suva
®
Freon 503
Refrigerant Piping Guide
refrigerants
Suction Line Size .. Evaporator to Compressor
- 60º F through -100º F
(67 through 17 psig)
- 101º F through - 115º F
(17 through 7 psig)
- 116º F through - 130º F
(6 psig through 2" Hg)
Suggested Allowable Pressure Drop in psig = 2Fº
2.5 lbs. (2Fº)
System
Capacity
BTU/Hr.
System
Capacity
Tons/Hr
25
50
75
100
12,000
18,000
24,000
30,000
36,000
42,000
1.00
1.50
2.00
2.50
3.00
3.50
3/4
3/4
7/8
7/8
1 1/8
1 1/8
3/4
7/8
7/8
1 1/8
1 1/8
1 1/8
3/4
7/8
1 1/8
1 1/8
1 1/8
1 3/8
7/8
1 1/8
1 1/8
1 1/8
1 3/8
1 3/8
48,000
60,000
92,000
120,000
180,000
240,000
4.00
5.00
7.50
10.00
15.00
20.00
1 1/8
1 1/8
1 3/8
1 5/8
2 1/8
2 1/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 5/8
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 5/8
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
1.4 lbs. (2Fº)
1.0 lbs. (2Fº)
N/A
1.00
1.50
2.00
2.50
3.00
3.50
System
Capacity
BTU/Hr.
12,000
18,000
24,000
30,000
36,000
42,000
N/A
4.00
5.00
7.50
10.00
15.00
20.00
48,000
60,000
92,000
120,000
180,000
240,000
N/A
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Suction Line Lengths ... feet
N/A
•
•
•
•
•
N/A
N/A
N/A
150
25
N/A
3/4
7/8
1 1/8
1 1/8
1 1/8
1 1/8
N/A
1 3/8
1 3/8
1 5/8
2 1/8
2 1/8
2 1/8
N/A
N/A
50
75
100
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 5/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
N/A
N/A
N/A
150
25
50
75
100
N/A
7/8
1 1/8
1 1/8
1 3/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
1 1/8
1 3/8
1 3/8
1 5/8
1 5/8
2 1/8
1 1/8
1 3/8
1 5/8
1 5/8
2 1/8
2 1/8
N/A
1 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
1 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 5/8
2 1/8
2 1/8
2 5/8
2 5/8
3 1/8
3 5/8
N/A
N/A
N/A
N/A
N/A
150
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of - 60º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of - 20º F.
Section 10 page .. 26
Suva
®
Freon 503
Refrigerant Piping Guide
Discharge Line Size
Compressor to Condenser
System
Capacity
Tons/Hr
12,000
18,000
24,000
30,000
36,000
42,000
1.00
1.50
2.00
2.50
3.00
3.50
48,000
60,000
92,000
120,000
180,000
240,000
4.00
5.00
7.50
10.00
15.00
20.00
300,000
360,000
420,000
480,000
540,000
600,000
25.00
30.00
35.00
40.00
45.00
50.00
Liquid Line Size
Receiver to TXV
Liquid Condensate Line
Condenser to Receiver
1Fº (3.1 psi) pressure drop maximum
System
Capacity
BTU/Hr.
refrigerants
Condensate drain / vent
1Fº (3.1 psi) pressure drop maximum
N/A
1.00
1.50
2.00
2.50
3.00
3.50
System
Capacity
BTU/Hr.
12,000
18,000
24,000
30,000
36,000
42,000
N/A
4.00
5.00
7.50
10.00
15.00
20.00
48,000
60,000
92,000
120,000
180,000
240,000
N/A
25.00
30.00
35.00
40.00
45.00
50.00
300,000
360,000
420,000
480,000
540,000
600,000
Equivalent Line Lengths ... feet
25
50
75
100
1/2
5/8
5/8
3/4
3/4
3/4
5/8
5/8
3/4
3/4
7/8
7/8
5/8
3/4
3/4
7/8
7/8
1 1/8
5/8
3/4
7/8
7/8
1 1/8
1 1/8
7/8
7/8
1 1/8
1 1/8
1 3/8
1 3/8
7/8
1 1/8
1 1/8
1 3/8
1 5/8
1 5/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
2 1/8
1 1/8
1 1/8
1 3/8
1 3/8
1 5/8
2 1/8
N/A
•
•
•
•
•
N/A
N/A
N/A
150
N/A
N/A
N/A
25
50
75
1/2
1/2
5/8
5/8
5/8
5/8
1/2
5/8
5/8
5/8
5/8
3/4
1/2
5/8
5/8
5/8
3/4
3/4
5/8
5/8
5/8
3/4
3/4
3/4
7/8
3/4
7/8 1 1/8
1 1/8 1 1/8
3/4
3/4
7/8
7/8
1 1/8
1 3/8
3/4
3/4
7/8
1 1/8
1 3/8
1 3/8
1/2
1/2
1/2
1/2
5/8
5/8
N/A
N/A
N/A
100
N/A
150
25
50
75
100
N/A
3/8
3/8
3/8
3/8
1/2
1/2
3/8
3/8
1/2
1/2
1/2
1/2
3/8
1/2
1/2
1/2
1/2
5/8
3/8
1/2
1/2
1/2
5/8
5/8
N/A
1/2
1/2
5/8
5/8
3/4
7/8
1/2
5/8
5/8
3/4
7/8
7/8
5/8
5/8
3/4
3/4
7/8
1 1/8
5/8
5/8
3/4
7/8
1 1/8
1 1/8
N/A
N/A
N/A
N/A
N/A
150
System
Capacity
Tons/Hr
Refer to DuPont Refrigerant Expert, version 2.0 for actual velocities and pressure drops.
Equivalent length is actual length plus friction losses caused by fittings and accessories.
Line sizes are expressed in outside diameter of type “L” copper tubing.
Line sizes are calculated at rated full load system capacity.
All selections are based on a maximum of - 60º F return gas entering the compressor and a refrigerant
condensing and liquid line temperature of - 20º F.
Section 10 page .. 27
®
Suva
®
refrigerants
The DuPont Company assumes no obligations or liability for any advice furnished or for any results obtained with respect to this information. All such advice is given and
accepted at buyers risk. This disclosure of information herein is not a license to operate under, or a recommendation to infringe any patent of DuPont or others.
® Registered trademark of E. I. Du Pont de Nemours and Company, DuPont Canada Inc. is a licensee.
© Copyright 2001 by DuPont Canada Inc., Mississauga, Ontario, Canada L5N 5M8
C-701530
Printed in Canada
Dated October 2001
Supersedes July 1999